For a Titan, a Hill Giant is CR 7. Make it huge (or bigger) and bump it's Int and/or Cha up (I'd probably leave the rest of it's stats alone, of course it's overall AC goes down a bit...). Gestalt with Sorcerer (or Wizard, or Cleric...) for 5 or 6 of it's 12 hit dice. Then add a few extra feats...
or:
Barbaralkis, Titan of the Wild Peaks
Huge Giant (Native Outsider, Chaotic)
Hit Dice: 6d12 + 48 (92 hp)
Initiative: +6 (+2 Dex, +4 Improved Initiative)
Speed: 50' (fly 40' with winged boots)
AC: 21 (-2 Size, +2 Dex, +5 Natural, +6 +1 breastplate of light fortification), touch 11, flat-footed 19
Base Attack / Grapple: +6 / +21
Attack: Granite Edge (Huge +2 Dancing Battleaxe), +15 melee (3d6+7/x3) or
or Huge Masterwork Composite (20 Str) Shortbow, +9 ranged (2d6+5/x3)
Full Attack: Granite Edge (Huge +2 Dancing Battleaxe), +15/+10 melee (3d6+7/x3)
or Huge Masterwork Composite (20 Str) Shortbow, +9/+4 ranged (2d6+5/x3)
Space/Reach: 15'/15'
Special Attacks: Spells (Druid 5/4/4/3)
Special Qualities: Animal companion (dire mountain goat), darkvision 90', fast movement, low-light vision, nature sense, rage 2x / day, regeneration 10*, resist fire 10, resist nature's lure, scent, trackless step, trap sense +2, wild empathy, wild shape (2/day), woodland (mountainside) stride
Saves: Fort +13, Ref +4, Will +9
Abilities: Str 25, Dex 14, Con 23, Int 16, Wis 15, Cha 16
Skills: Climb +8, Concentration +11, Handle Animal +4, Heal +13, Intimidate +12, Jump +12, Knowledge (Nature) +11, Listen +7, Spot +7, Survival +13
Feats: Alertness, Awesome Blow, Brew Potion, Cleave, Combat Casting, Craft Magic Arms and Armor, Great Fortitude, Iron Will, Power Attack, Quick Draw, Improved Bull Rush, Improved Initiative, Improved Toughness, Self-Sufficient, Snatch, Toughness (x2), Track
Environment: the Wild Peaks
Organization: Unique
CR: ~12 (?)
Treasure: As above, plus minor ring of fire resistance and winged boots
Alignment: Chaotic Neutral
* Barbaralkis cannot regenerate damage dealt to him in melee by any creature that knows his true name.