I don’t want to compete against 4k paragon week 2 bots.
I played 3 seasons ago on SSF and lost rank 1 to a 4k paragon around week 2 and quitted. (it had like +300hs already)
I always thought that there would be more competence in normal seasonal leaderboards because of the group blasters. However, most of them seem to push solo leaderboards with TH.
I usually play for at least 4 weeks when season starts.
So… back to SSF?
If you only gonna play 4 weeks then you will still be overtaken in time. But i think ssf already has less bots, hc also has less bots, so maybe try ssf hc crusader roland set?
If you’re looking to compete on the leaderboards, good luck finding one without bots. I suggest early on is your best chance. After a couple of weeks, bots will overtake the top spots. I always aim to rank top 100 before quitting but I rarely go over 2000 paragon in one season
There are cheaters across all modes, so you aren’t going to find one without.
As for which one has the least cheaters, that would be the one with the least players HC SSFM.
2 weeks is 336 hours. If an account has 300-ish hours played in that time it is physically impossible for one player following the rules to achieve. You would think this would be a huge red flag and at least a few questions asked. This makes leaderboards lack any importance or relevance. This is why I have no interest in leaderboards.
Conquest and seasonal achievement leaderboards are less prone to botting, and you don’t have to worry about someone later surpassing your rank (with the one exception of not getting a perfect seasonal achievement score).
Unfortunately, there still is cheating that goes on with the conquest and seasonal achievement leaderboards (e.g. map hacks and bots).
But overall, it’s much more limited, and is possible for legit players to still take #1 on those boards.
Early season has fewer botters than late.
SSF has fewer than normal.
HC has fewer than SC.
Off-meta classes have fewer than meta classes, especially early season.
Off-meta builds have fewer than meta builds, especially early season.
So go do a first week push with no-set WD on HC SSF. Almost guaranteed to have no botting competition! Or any other competition either for that matter. 
HC SSF Vyr’s only has 15 clears! You can get top 20 with GR1, top 10 with GR55, and rank 1 with GR102. Easy.
Hell, I’m still top 20 with the UE for DH right now. Last time I checked, was ranked 12th. And that was from before the “blip”. I haven’t pushed again yet.
LOL, you can tell not many people playing. I rolled a WD after the glitch and ranked 11 on solo season and I don’t even like play WD. I’m pretty sure I can easily get him top 10, but I’ve lost interest.