Whyte could easily end up in this category Micky Ward - finished 38 -13 - beat some good fighters, lost to some less than stellar ones. At his best a brawling handful with an elite body punch. Pablo Cesar Cano - Probably best known for giving a past prime Morales some trouble early on. Always did just enough to loose in big fights then out of nowhere KO'd Linares in a round. Currently 33-8. Has a really strange record. Squaked an SD against Theophane who is a decent Brit level/Euro level fighter. A draw against a fighter with 0 wins early in his career. Gave Morales some trouble before the fight ended,does well in loosing efforts to Paulie and Mosley before loosing to a guy who was 26-9 by stoppage. Wins some looses some to varying degrees of opponents before sparking Linares in a major shock.
Malignaggi mentioned on his youtube channel that Cano is notoriously lazy in training which might be the reason for his up and down career.
Ralph "Tiger" Jones from the 50s-60s (there was also a Tiger Jones in the 90s) 52-32-5 record, but wins over a lot of contenders including Sugar Ray Robinson