Even though looks dont mean shit and I wouldnt choose my side based on how hard they looked lol ...

But to answer your question.. Just by looks Id go with..

Vitali - He has this look of bad ass Russian mobster and his sheer size could be intimidating..

I kinda like Vitali's facial expression..

Tommy Hearns

Gerald McCllelan- He had a stone cold look and dude just looks like a killer.. Real recognized real

Denis Lebedev- He looks like a Russian mob henchman with his fucked up lips that looks like a straight up battle scar..

Kovalev

Pacquiao- I know people are going to disagree but when Pacman has a straight face, he has an eye of a killer..

Margarito- Pure bad ass... With shaved head, he looks like some down ass cholo but once he grew out his hair and wore sunglasses, he turned into a fuckin Mexican Cartel member.. Margarito is my boy right there..

Rafael Marquez- Rafael probably has the best mad dog by far.. Rafael has this eye squinching thing going on, it's hard to explain but he looks like a gangster.. He looks like a fighter through and through..

BTW, hope you get better pal.. get plently of rest