Absolutley. Even if he returned to beat Williams id give him serious respect. However, my sentiment is that Margaritos repuatation, his record, his career they have all been built on the foundation of being naturally bigger, stronger and rougher than his opposition rather than having any actual advantage in skills over the opponent.
Now in a sense i respect that, i mean my favourite fighters include JCC, Ricky Hatton, Gerald McClellan and Roberto Duran, guys famous for out muscling their opposition, but my issue is that when Antonio Margarito was faced with a fighter big enough to nullify his size advantage (Williams,) even tho he was more expierienced, even tho he was favourite and champion he failed. To me this illustrated Margaritos Lack of technical background and highlighted his reliance on his size advantage.

Now should he beat the fighters you have named i would greatly respect him, but as El Gamo stated earlier i'm not allowed speak hypothetically so il believe it when ni see it i guess.

Finally i never said Tony was a bad fighter, i simply said he was second tier, behind boxing's superstars at the moment.