A few names come to my mind, of individuals who have put up some very ripped pics. Keep in mind, people have varying moments of being ripped, depending on their metabolic state, etc.
Chris Solinsky--in one of the Wisconsin to Worlds videos, he and his training mates are doing some routine drills over hurdles, and he's got quite an upper body.
Prefontaine--the pic that comes to mind is one of the ones where he's training alone in, presumably, the UO outdoor track, with the stadium seating in the back, sun blazing. Probably doing some fast repeats.
Kemboi--he's on the skinny side, but that's some incredible honed, skinny muscle fibre. In general, the stable of the topmost Kenyan steeplers are just incredible athletes.
Adam Goucher--there's a pic, maybe from 2004 or 2007, where he's training on the Nike Campus.
Lopez Lomong--there is a pic of him where his abdominals are quite bulgingly defined... neither bulky nor striated and skinny like Kemboi
Galen Rupp--in one video of his where Coach Salazar does some talking and Rupp does some repeats on an outdoor track, I think from 2010.
meb keflezighi--yeah that one pic is incredible
Alan Webb--one imagines, perhaps idealizes, if Alan Webb were not only to regain form but to come into destinal world record breaking form, he might sport some lean ripped musculature.
Rob Myers--he's got some bulging muscles
Of course, a lot of guys, including some of the folk mentioned, who could be ripped don't necessarily train or live a lifestyle with the intended ends of being the most "ripped," but rather have to be practical insofar as performance geared training and a performance oriented lifestyle are concerned.