What is the best role to carry with in s8

Jungle.

Pros: No minions to miss = Instantly easier game. Cons: Everything that goes wrong in a game is always your fault. Everything.

ADC.

If you're doing well, that's already 2/5 people on your team ahead of 2/5 people on the enemy team. Add to that the carry power of the meta ADCs like Vayne/Tristana/Twitch and yea, it's probably the easiest to snowball with.

Sure people will say it's support reliant but unless you've got a legit braindead support (doesn't happen as often as ADC mains act), it shouldn't matter. All you need to do is survive the laning phase and it's usually GG.

With that said, Mid/Jgl aren't far behind either.

Whatever role ur best at there are challengers in every position so they can all hardcarry.

Mid, you have an impact on every lane, your lane is the shortest and usually hardest to gank/freeze you out of lane. Pick a mobile midlaner (zed, talon, kat, TF) and roam whenever you can. SoloQ never listen to pings, you can easily put pressure on any other lane that gets outta line. Plus because of the snowbally nature of these champs you can close games fast enough and shut down most enemy carries unless they too snowball.

Midlaner assassin who can roam easily, hypercarry adc (Vayne for instance), not sure about this one but a tank jungler (I don't really play SR anymore, but I carried a lot of games with Sejuani jungle), and try to avoid bruisers / fighters (Riven), they are in a bad spot right now

Dunno why anyone is saying anything other than ADC, their items are much cheaper than every other lane and snowball the hardest atm.

Top lane is probably the strongest role for solo Q right now, TF Blade for example has been rank 1 all season as a top main

Any beefy champion with a flashy engage, no matter the role. Your teammates see you go in and they clean up. The trick is in the timing - it can take a lot of practice to get a good feel.