I’ve had this very conversation with friends recently. Cycling and athletics seems to get the doping headlines, everyone else sits back and quietly watches.
A few of my thoughts on random sports:
Football. Endurance based sport (players basically do 10km of shuttle sprints over 90 minutes) with skills aspect and huge rewards. You get a lot of “he’s too small/not fast enough type comments in junior/youth sport as well. Add in young men with lots of money and an alleged penchant for recreation drugs and I would be gob smacked if it was not full of PEDs and recreational stuff. Also Google Operation Puerto and Spanish football
Rugby. Well documented recreational problems over the year along with a huge increase in the size of players and therefore the impacts of a game on the bodies. Lots of “recovery” and lots of ‘roids would be my guess.
Golf. A bit of something to help you get over the yips sir? Why thank you. See also darts, snooker, etc.
I think what cycling does well (or badly depending on your perspective) is that it is open about the tests, shouts about the bans and talks about the problem. Many other sports simply ignore or hide the problems completely.