Nice thought! I'll do two.

I'm a fan of Ricardo Lopez because

1. He grew as a technician even after being champion until at around 28 he was the finest technical fighter since Eder Jofre;
2. He fought everyone there was to fight and often did so in the other guy's hometown;
3. He knocked men out with one punch straight right hands, one punch left hooks and one punch uppercuts with each hand;
4. When he was aged and his skills fading he struggled with a younger, stronger Bufalo Alvarez. In their second fight Alvarez blew weight by TWO divisions and Lopez agreed to fight anyway. Cut in four places and behind Lopez began coming to ring center with hands held high with ten seconds left in the rest period so he'd have every chance to get after Bufalo. As clear a display of boxing spirit as one will ever see.

I'm a fan of Roberto Duran because

1. He was simply the most ferocious man in the ring I've ever seen live;
2. He too was an extraordinary technician with exceptional feet, great balance, every punch in the book;
3. He succeeded using a number of different approaches in the ring. Stalking (Ken Buchanan, Ray Lampkin) Brawling (Leonard I, Hiroshi Kobayashi) and counterpunching (DeJesus III, The Blade);
4. He was as relaxed in the ring as anyone I've ever seen;
5. After No Mas he built an entire second career through sheer willpower.