Felix Trinidad vs Terry Norris

in fact, that's the most likely scenario

Terry with his great footspeed, easily outmanuevers the much slower Trinidad, much the same way DLH did, scoring at will until finally, a groggy Tito finally succumbs to the accumulation of punishment. Norris in 10 one sided rounds

 

Norris was exceptional at 154 between 1990 and 1992 - or from when he won the title against Mugabi up to and including his win over Meldrick Taylor. That Norris would have been a match for any top light middleweight - Hearns, McCallum or Trinidad.

From 1993 onwards though, he showed increasing vulnerability, first with the knockdown against Troy Walters, then being destroyed by Simon Brown and then the disastrous DQs against Luis Santana. He could still box rings round fighters when he chose to show that discipline, but he didn't have a great temperament much of the time and was vulnerable to a good puncher, let alone a very good one like Trinidad.

Although I'd slightly favour the Norris of 90-92, Trinidad would beat any version of Norris from 93 onwards so he's my pick overall.