Greater Devils (off the top of my head: Malebranche/"Horned", Ice and Pit Fiends...but there might be others I don't know/recall at the moment)
All Greater Devils automatically: Detect Magic, Detect Invisibility, Tongues, Cause Fear, Darkness Sphere, Detect Thoughts
At will, add any 3 of the following: Major Image, Produce Flame, Putrify Food/Water, Change Self, Invisibility, Fire Bolt or Ray of Frost, Mirror Image, Levitate, Heat/Chill Metal, Stinking Cloud, Dimension Door.
+3 from the following list, 3 times per day: Wall of Fire or Ice, Fireball or Icestorm, Phantasmal Killer, Lightning Bolt, Cure/Cause Disease, Dispel Magic, Locate/Obscure Object, Animate Dead, Cure/Cause Serious Wounds
Resistances & Immunities:
Immunity to: non-magic weapons, silver/silvered weapons, enchantment/charm spells & effects, illusion spells & effects, poison, natural and magical fire, natural and magical cold, natural lightning.
Resistance [Half Damage]: magical lightning, magic force/energy, acid
Full Damage: magic weapons, cold iron/cold iron weapons, spells and effects (as from magic items) that specifically deal with extra-planar beings and/or fiends of the lower planes specifically.