The 1980 Olympic medal tables in track and field are an interesting place to look if you want to know whether heavy doping was associated with higher mortality levels. Most of the medalists were born in the 1950s, and so would be in their 60s now. Among the Soviet men who medaled, 7 out of 29 have died, one probably a murder victim. However, among the heavily, heavily doped Soviet and Eastern Bloc women (almost all of the medalists were from Soviet or East German and nearly all Eastern Bloc--Great Britain got bronzes behind the Soviets and East Germans in the relays, and there wasn't much more), the death rate was much, much lower. Only 2 out of 59 or so different medalists have died, according to wiki's individual pages, one of them Olizarenko, the double medalist from the U.S.S.R., who died of ALS last year, and one of them from Great Britain, although interestingly the Brit later competed in body-building.
It looks like among the men, 4 others have died, Slusarski in a car crash, plus Mennea, Oliveira, and Yifter (at age 72--he was already old in 1980).