I'd say the Perterson fight was his best both undefeated both highly thought of Then probably Holt. Holt had the expirence and power that anyone would fear plus he had to get off the canvas Then Witter
Obviously his breakout fight wasnt spectacular, in fact it was probably his ugliest fight ive seen and was not pretty to watch as you said but he got the job done and came away with a victory. Nobody ever looks good against Witter anyway and Witter was coming off the best run of his career so id say still it was his best performance, regardless of how bad he looked in it
All of his fights have been special, but this one does stand out, mainly because he was unheard of, a huge underdog, and he fought in england! I remember when he stepped into the ring and i saw his physique, i knew there was something really good about him
i completely overlooked him. even when he scored the knockdown i still thought witter would pull it out.