I dunno, I think Wolf is pretty interesting, especially on Hard+ where it's important to debuff enemies. Since companion grows to larger size as you level up, and Animal Growth doubles on that, you could probably stunlock-trip dragons lol.Anyone rolled a druid? not sure which animal companion to take.
Smilodon for 5 attacks at level 1
Since poison is quite powerful in this game, going Nausicaa might also be fun with a giant centipede.
Smilodon has been an effective damage dealer up to this point (I have just earned my barony at lvl 4) but I am starting to think some utility might have been more interesting.