Street Fighter and Killer Instinct were two great ones that I spend a lot of time and quarters on that could have easily made this list! Primal Rage deserves an honorable mention too (the fighting game where you choose different dinosaurs at your fighters).
Thanks for the comment and reminding me of these great fighting games!
I don't remember Primal Rage but there was one called Fatal Fury were you could transform into powerful beasts with a humanoid form.
But my favorite fighting game of all time is Dead or ALive: