.... who are often labelled boring. For example, Rigondeaux is called boring by basically everybody, he was in a FOTY contender vs Ceja. That's the sorta thing I'm looking for.
Mayweather is often called boring, but I love his fights with Cuello, Chavez, Augustus and Corley. Not to mention the spectacles he put on vs Manfredy, Gatti, Corrales and N'Dou.
Hopkins vs Echols II and Mercado I were also great fights from somebody known as being impenetrably boring.
Floyd only became boring like post-Cotto. He did have some real snoozers in his prime though - like against Sosa and Baldomir. The Castillo rematch was pretty boring too.
As a rule, I find post retirement Floyd boring. Sure, there's exceptions like Cotto and Ortiz, but his fights became pretty fuckin boring all-round when he came back. I think it was the fact that he changed his style to suit his bad hands at a higher weight more than a physical decline, though. In his early days, he really was fun to watch. I haven't seen the Castillo fights in a couple years now, but I recalled the rematch being a really great performance.
Sammy Angott was so widely derided as a "boring" fighter that he was nicknamed "The Clutch," but he was known to throw caution to the wind and engage in some brawls from time to time.
Pernell Whitaker is not generally remembered as an exciting fighter, but he was actually fairly aggressive, and at times even explosive as a LW and reverted back to that approach in some of the last defenses of his WW title reign.
Angott is an interesting case, because at the time, there were plenty who didn't find him boring. His nickname came from his insistence on holding inbetween spurts, so he could cut their workrate in half while still getting his own in. It obviously worked, given that he's now an ATG, but I specifically remember reading one newspaper write up which claims Angott to be "one of the most exciting fighters in modern times".