I would suggest manticore, but that’s basically just the chimera path.
Perhaps basilisk? Basically lizard path but with a more snake-like theme and different eyes. Petrifying eye special ability that paralyses foes for five turns? Probably too OP, so a bar or two of stamina cost might be required. Makes NPCs trust you less because you can’t look them in the eyes, unless you want them to, like a mugger so that you can make them really regret trying to rob you. Occasional molting if you want to add it too. Don’t know what you could do with basilisk skin.
Ogre. Large, in charge, and ugly. Tusks if you want. Thick skin definitely, for less damage taken. Dense bones as well, extra bar or two of health all-round but it makes it harder to swim and adds encumbrance.
Golem. Rock or crystal alternative to plant mutant. Huge, very strong, very tough, impossible to swim but at its latest stage you don’t need to breathe anyway. Doesn’t need a jackhammer for mining or walls. Malus to dexterity. Can only eat rocks, sand, and other minerals. Rock variant has extra defense, crystal variant has a huge amount of mana and deals cut damage instead of bash with unarmed.
Fairy. Small flying humanoid. Fragile but agile. Bonus max mana. Lower carry weight. Can switch from flying mode to walking mode. In flying mode you cannot trigger any ground-based effects, are much faster, and nothing slows you down, but you have even less carrying capacity and have to watch out for webs.
Demon. Infernal being. Immune to fire and smoke. Claws, horns, and wings. Wings cannot make you fly but allow you to make great leaps, useful for roof jumping or getting out of situations. Bonus to mana and an increase to learning and mastering pyromancy spells.