Said Aouita 1987 3:29.46 12:58.39
Daniel Komen 1997 3:29.46 12:39.74
Ali Saidi-Sief* 2001 3:29.51 12:50.86
Hicham El Guerrouj 2003 3:26.00 12:50.24
Bernard Lagat 2005 3:26.34 12:59.22
*Later suspended for doping violation in same year as sub-3:30 performance.
Pretty exclusive list considering around 20 guys have gone sub 3:30 and around 60 have gone sub 13:00. I think it's inevitable that Rashid Ramzi will make this list. Mulugeta Wendimu, Isaac Songok and Augustine Choge are close, although none have run a fast 1500m in a few years (I think Wendimu was actually running marathons in 2006-2007 before comming back to the track). Sydnee Maree was also pretty close back in 1985.