Everyone talks about Street Fighter or Tekken, but let's hear it for the weirder, unique, underrated, or forgotten fighting games out there.
My favorite is a Gundam game. Federation Vs. Zeon and it's sequel, Gundam vs Zeta Gundam, made by Capcom. The original games in the Gundam Versus franchise of games. imo the series was at it's best when it was handled by Capcom.
I'm not actually a fan of standard """fighting games""" so most of my list is gonna stretch that definition lol
Bio Freaks was cool, 3D fighter with lots of freedom of movement including limited flight, certain attacks could dismember the opponent and restrict their moveset for the rest of that round
Virtual-On was an absolute blast and I've never seen anything quite like it, third-person mecha fighter where most attacks are either wide-area or homing projectiles but everyone's also fast as fuck. Had a cool arcade setup with twin joysticks and tank-style-ish movement controls
I've recently been playing Final Fantasy Dissidia which is pretty unique, Lethal League is extremely unique