Gon is probably the strongest. Followed by Toriko, Zoro/Kenny, Naruto, Natsu. The only thing I might switch is Toriko and Gon. I'm just not sure. Gon's durability is fairly poor, probably the worst one here except sage Naruto and that's a maybe. But he has punching feats that probably rival Toriko/Luffy. I can't post scans but I remember him punching a chimera to another island or something like that. The enemy went into the ether, farther than the eye could see.