Cleon
Legend
well alli have is BOVD and most of the demonlords ranged from 26-40 hd in that one, so HD in the 30 ish range. Im ok with An Obryth.
Here's a handy bunch of comparisons:
Baalzebul, Lord of the Seventh [Arch-Devil]
Book of Vile Darkness: Huge; CR 29; HD 38 (665 hp); AC 47, touch 22, flat-footed 45; SR 41; Abilities Str 41, Dex 15, Con 36, Int 30, Wis 29, Cha 27
Fiendish Codex II: Huge, CR 23; HD 30 (495 hp); AC 47, touch 9, flat-footed 46; SR 31; Abilities Str 39, Dex 13, Con 34, Int 28, Wis 27, Cha 25
Baphomet, Prince of Beasts
Fiendish Codex I: Huge, CR 20; HD 24 (372 hp); AC 38, touch 11, flat-footed 38 [should be touch 12, flat-footed 34]; SR 31; Abilities Str 33, Dex 16, Con 33, Int 18, Wis 26, Cha 20
Dragon Magazine #341 : Large; CR 24; HD 32 (560 hp); AC 39, touch 13, flat-footed 39 [should be 35]; SR 38; Abilities Str 30, Dex 18, Con 36, Int 20, Wis 28, Cha 22
Dagon, Prince of the Darkened Depths
Fiendish Codex I: Gargantuan; CR 22; HD 25 (462 hp); AC 42, touch 7, flat-footed 41; SR 33; Abilities Str 36, Dex 12, Con 38, Int 22, Wis 25, Cha 16
Dragon Magazine #349 : Colossal; CR 30; HD 33 (709 hp); AC 50, touch 4, flat-footed 48; SR 48; Abilities Str 46, Dex 14, Con 44, Int 24, Wis 27, Cha 20
Demogorgon, Prince of Demons
Book of Vile Darkness: Huge; CR 30; HD 39 (565 hp); AC 47, touch 25, flat-footed 39; SR 42; Abilities Str 28, Dex 27, Con 31, Int 31, Wis 29, Cha 30
Fiendish Codex I: Huge; CR 23; HD 27 (499 hp); AC 43, touch 16, flat-footed 35; SR 34; Abilities Str 38, Dex 27, Con 38, Int 26, Wis 22, Cha 28
Dragon Magazine #357 : Huge; CR 33; HD 37 (869 hp); AC 59, touch 23, flat-footed 44; SR 46; Abilities Str 42, Dex 32, Con 46, Int 30, Wis 26, Cha 32
Elemental Princes of Evil
Cryonax, Prince of Elemental Evil Cold
Dragon Magazine #347 : Large; CR 22; HD 42 (525 hp); AC 42, touch 26, flat-footed 31; SR 31; Abilities Str 39, Dex 32, Con 27, Int 22, Wis 23, Cha 22
Imix, Prince of Elemental Evil Fire
Dragon Magazine #347 : Huge; CR 22; HD 42 (483 hp); AC 41, touch 28, flat-footed 28; SR 33; Abilities Str 35, Dex 37, Con 24, Int 24, Wis 24, Cha 23
Ogrémoch, Prince of Elemental Evil Earth
Dragon Magazine #347 : Large; CR 24; HD 45 (877 hp); AC 45, touch 18, flat-footed 42; SR 34; Abilities Str 48, Dex 16, Con 40, Int 20, Wis 23, Cha 21
Olhydra, Princess of Elemental Evil Water
Dragon Magazine #347 : Huge, CR 22; HD 42 (567 hp); AC 41, touch 23, flat-footed 34; SR 30; Abilities Str 41, Dex 25, Con 29, Int 24, Wis 26, Cha 25
Fraz-Urb'lu, Prince of Deception
Fiendish Codex I: Huge; CR 21; HD 24 (420 hp); AC 37, touch 12, flat-footed 33; SR 32; Abilities Str 30, Dex 18, Con 36, Int 22, Wis 19, Cha 25
Dragon Magazine #333 : Huge; CR 28; HD 34 (629 hp); AC 41, touch 18, flat-footed 36; SR 36; Abilities Str 39, Dex 20, Con 39, Int 24, Wis 23, Cha 27
Graz'zt, The Dark Prince
Book of Vile Darkness: Large; CR 24; HD 36 (486 hp); AC 43, touch 25, flat-footed 33; SR 38; Abilities Str 26, Dex 30, Con 28, Int 35, Wis 22, Cha 39
Fiendish Codex I: Large; CR 22; HD 27 (445 hp); AC 54, touch 12, flat-footed 51; SR 33; Abilities Str 27, Dex 28, Con 35, Int 33, Wis 20, Cha 38
Juiblex, The Faceless Lord
Book of Vile Darkness: Large; CR 20; HD 26 (585 hp); AC 37, touch 22, flat-footed 34; SR 30; Abilities Str 39, Dex 16, Con 47, Int 24, Wis 24, Cha 20
Fiendish Codex I: Large; CR 19; HD 21 (346 hp); AC 31, touch 11, flat-footed 29; SR 30; Abilities Str 30, Dex 14, Con 34, Int 22, Wis 22, Cha 18
Kostchtchie, Prince of Wrath
Fiendish Codex I: Huge; CR 21; HD 23 (425 hp); AC 41, touch 9, flat-footed 40; SR 32; Abilities Str 40, Dex 12, Con 38, Int 18, Wis 20, Cha 23
Dragon Magazine #345 : Huge; CR 28; HD 30 (615 hp); AC 46, touch 14, flat-footed 44; SR 41; Abilities Str 44, Dex 14, Con 40, Int 20, Wis 22, Cha 25
Malcanthet, Queen of the Succubi
Fiendish Codex I: Medium; CR 21; HD 25 (412 hp); AC 42, touch 35, flat-footed 32; SR 32; Abilities Str 24, Dex 30, Con 34, Int 24, Wis 28, Cha 40
Dragon Magazine #353 : Medium; CR 28; HD 33 (429 hp); AC 50, touch 38, flat-footed 39; SR 41; Abilities Str 26, Dex 32, Con 36, Int 26, Wis 30, Cha 44
Obox-Ob, Prince of Vermin
Fiendish Codex I: Huge; CR 22; HD 26 (455 hp); AC 41, touch 11, flat-footed 38; SR 33; Abilities Str 34, Dex 17, Con 36, Int 23, Wis 24, Cha 27
Orcus, Prince of the Undead
Book of Vile Darkness: Large; CR 28; HD 37 (758 hp); AC 47, touch 27, flat-footed 40; SR 41; Abilities Str 39, Dex 25, Con 43, Int 29, Wis 22, Cha 21
Fiendish Codex I: Large; CR 22; HD 26 (455 hp); AC 48, touch 20, flat-footed 42; SR 35; Abilities Str 35, Dex 23, Con 37, Int 27, Wis 20, Cha 19
Pale Night
Fiendish Codex I: Medium; CR 21; HD 24 (372 hp); AC 36, touch 36, flat-footed 22; SR 32; Abilities Str —, Dex 38, Con 32, Int 25, Wis 28, Cha 35
Pazuzu, Prince of the Lower Aerial Kingdoms
Fiendish Codex I: Medium; CR 22; HD 27 (445 hp); AC 43, touch 23, flat-footed 30; SR ; Abilities Str 28, Dex 36, Con 35, Int 28, Wis 24, Cha 33
Dragon Magazine #329 : Medium; CR 29; HD 38 (551 hp); AC 46, touch 32, flat-footed 32; SR 42; Abilities Str 26, Dex 38, Con 31, Int 30, Wis 26, Cha 35
Yeenoghu, Prince of Gnolls
Book of Vile Darkness: Large; CR ; HD ( hp); AC 42, touch 24, flat-footed 33; SR 32; Abilities Str 37, Dex 28, Con 32, Int 26, Wis 25, Cha 25
Fiendish Codex I: Large; CR 20; HD 24 (372 hp); AC 45, touch 17, flat-footed 37; SR 31; Abilities Str 30, Dex 26, Con 32, Int 24, Wis 30, Cha 23
Zuggtmoy, Queen of Fungi
Fiendish Codex I: Large; CR 21; HD 26 (429 hp); AC 41, touch 11, flat-footed 39; SR 32; Abilities Str 30, Dex 14, Con 34, Int 24, Wis 22, Cha 18
Dragon Magazine #337 : Large; CR 25; HD 35 (542 hp); AC 41, touch 11, flat-footed 39; SR 33; Abilities Str 36, Dex 14, Con 33, Int 26, Wis 24, Cha 20