Aouita-time-1:43.8 800m, 12:58 hardware-bronze 800m, gold 5000m
Gebreselassie-time-1500i 3:31, 2:03:59marathon wr hardware-world indoor 1500 champion, 2xOly 10k champ, no big marathon wins (I don't count Berlin as a major, sorry)
Rod Dixon-time 1:47, 3:33, 2:08:59 hardware-bronze 1500m, NYC marathon win
Ovett-time-21.xx 200m speed, 1:44low, 64 minute half marathon speed. hardware-gold 800m,
Komen-time-3:29, 12:39 hardware-not much to speak of
The runner with the most range will almost certainly end up being a 5000/10000 type runner who works on speed enough to run a very good 800(1:44-1:46), and a great 1500 (3:29-3:30 then later turns to marathoning-I think Gebresselassie takes this one-he could probably run around 1:45-1:46 for 800m in his prime.
But so could a few other more distance oriented guys-I could see Komen running similar times to Haile had he not burnt out, and Aouita probably could have ran a decent sub 2:07 marathon had he been inclined later in his career. Bekele will probably end up running a pretty quick marathon as well.
Also, I'd like to add Goumri to the list-7:32, 12:50 and 2:05:30-and still active.