A hard list to make...Mainly because so many great fighters have been there at one point or another...Be it a start off point or passing point on the way to MW....Hearns, Leonard, Duran, Trinidad, etc...Terry Norris might be the number one because thats when he was "Terrible" Terry but others that could make a case for is...

Mike McCallum- The Body Snatcher was a bad man who beat other greats like McCrory, Jackson and Curry at 154 while WBA champion...He was never KO'd and 3 of his 5 losses came way past his best days and were at higher weights...2 of his 5 losses were to James Toney and 1 to RJJ..No shame there

Koichi Wajima- In the He held one version or another of this title. Pretty much for 7 or 8 yrs Wajima was always the man to fight in 154..It was not until the last couple of years of his career his chin started getting soft...He would lose one version of the title in one fight and pick up a defferent version the fight after that...

Fernando Vargas- The youngest JMW champion ever..Beat Wright and Quartey as champion won title from Yori Boy Campas when Yori Boy was only beaten by Trinidad and Lopez up until that point...