Classic beat-em-ups, your favorite?

[GigaBowser7]

Rampage: World Tour and Rampage 2: Universal Tour.

Kind of a platform/beat-em-up, though. And the people you beat up are buildings and the military. Everyone else just flees in panic.

[Allegretto]

I like Mortal combat...

[SHUTOKOU BATTLE 89]

I dont know if you are familiar with this, but I like Rival Turf.  I also love Ninja Gaiden, Double Dragon, and Mortal Kombat.

[NoPayneNoGain]

Seemed like most of the beat em ups I liked aren't listed, so here's my favorites:

Alien vs Predator (Arcade, SNES version was a different, inferior game.)
Captain Commando (Arcade, SNES port was poorly done.)
Knights of the Round (prefer arcade, but I remember the SNES port being pretty good.)
X-Men (Arcade, pretty shallow and basic even for a beat em up, but having 6 players at once is awesome.)