Re: Fighters who overcame all styles?
I would think that since "a boxer usually beats a puncher" that it would be easier to find examples of HOF "stylists" who meet this criteria, hence SRL and SRR, Ali, etc, etc.
The first name that came to mind for me was Duran. I'm not sure he even "had" a specific style, but he beat fast stylists (SRL), technicos (Dejesus), brutal punchers (Cuevas), spoilers (Viruet), and workhorses (Palamino). I'm no expert on Duran as some here are, but he handled every conceivable type of fighter without having a clear advantage in pure speed and athleticism. Older I get, the more I appreciate his accomplishments.
Marvin Hagler is also, IMO, an excellent fit for this thread.