what hero could turn a game around if they got free farm all game?

since in lower elo they don't really pay attention. what hero would that be. maybe anti mage?

It's not something you should try to do, since fighting is much easier to win with than farming, and having a "I must farm all the time" mentality is really not healthy.

But if you want some heroes that can carry bad allies on their own, here's the full list:

• My accomplishments

As you may notice, it's empty. That's because this is a team game, and being the one guy ahead of the enemies in farm doesn't mean a lot if the enemies lead all you allies in net worth, you're still playing 1 against 5 in a game that has halberds, abyssals, silver edges, and other things that'll make solo freefarm dota very hard.

Here are some candidates for possibly afk farming yourself to victory:
Anti-Mage, Sven, Juggernaut: These dudes can farm very quickly, and can potentially get a rampage with their ultimates if used well, and can offer a decent degree of splitpushing as well.

Medusa: You can farm fast, and in many drafts, it can become impossible to teamfight against you once you have that farm. She is much easier to counterpick than the 3 cleavers, and less mobile than them.

Arc Warden, Lycan, Lone Druid: These three can farm quickly, and rely entirely on splitpushing in order to win, manfighting and wiping them is not really an option, but killing their buildings super fast is the way to do it, and these 3 are unbelievable at it.