I know that the styles are swarmer, boxer, and brawler. But what modern fighters are some good examples of each style?
Boxer-Willie Pep, Sugar Ray Robinson Swarmer-Marciano Brawler-Young Vic Darchinyan my list but all this is Opinion
keep it simple. there's fight, flight, and a combination of fight/flight. either someone is coming or going, moving in circles or pressuring. then you can look at other variables like range, speed, volume, rhythm, etc. ali vs fraser leonard vs hearns (and witness how they switch roles back and forth)