I think Battletoads is a beat em up despite having racing parts and platforming. It's kind of similar to Double Dragon.
That being said, I voted Streets of Rage. Haven't played many Final Fights to put my thoughts into it. Same with Double Dragon. Battletoads is decent. TMNT was good in the arcades and the NES games of II and III. The SNES port of Turtles in Time is overrated. I felt Konami was a cookie cutter company when it came to beat-em-ups.

