Sam Soliman had a weird style. Merqui Sosa did to oral ways looked like he was about to trip. Freddie Norwood wasn't pleasing to the eye to watch.
Gianfranco Rosi should have been outlawed for aesthetic crimes. Bizarre to watch, so very, very ugly. At times I think he was as successful as he was because his opponents stood suspended in disbelief that anyone could have that horrible a style and be in the same ring with them. Limon is fascinating that way too. Were it not for his ridiculous chin and pigheaded belief in his own invincibility we'd never have heard of him. Physical attributes and talent only get one so far, he's living proof you don't really have to have those things.
Charley Burley, upright John L. Sullivan style with better footwork. Wladimir Klitschko, any time he got in trouble he looked like he was fighting four guys in the ring. Very awkward and jerky. Lost composure easily. Jeff Horn, it's basically wrestling and head-butts. A poor man's Andre Ward. Wilder, awkward, awful footwork, one trick pony.
All simply my opinion: Deontay Wilder is a slugger, but an odd one, in that he totally seems to be only looking for that one big punch. How the scoring is going doesn't seem to interest him at all. It mostly works for him because his power shot is devastating, and he usually lands it eventually. Tyson Fury is another odd one, because he's rather slow but he does seem to have some elements of all 3 major boxing styles in his arsenal, to varying degrees: Boxing, Slugging, and Swarming. That makes him a difficult opponent, in rematches, unless he (or his trainer) figures out what style to come with the first time.
First name that came into my head was Kirkland Laing the guy who beat Duran in 1982, a natural talent but his style was ugly to watch :
