So I want to main top, and I have a few champs for top that I'm good at, but mainly for situational picks, who else should I learn? I have:
In no particular order, those are my top lane champs.
Who else should I get and learn?
By the way, I am particularly good at .
There a few popular picks right now that can also head into the mid lane you might want to add to your collection:
I generally advise against actively choosing a main, rather than naturally developing one by simply playing it more than anything else, either because you enjoy it the most, or because it is usually your best option in champion select. If you are going to choose one, I would recommend playing one that is not terribly popular, but can do well in most situations. Mastering a champion that other people do not have much experience with can give you a hand up on your opponents, simply because they do not know how to handle you, for lack of knowledge of your strengths and weaknesses. Likewise, mastering a champion who can do well in most any match-up or team composition is a safe strategy, so long as that champion is not frequently banned.
irelia and rumble are the only 2 you really need to know
I found that having a physical damage champion, an magic damage champion, and a tank in my 'core' selection generally worked.
My preferred picks are:
If you are looking for other champions, it might be a good idea to learn:
I main 
I am able to beat everybody except jayce who counters me so hard.
would offer a decent selection for counter picking. and 
could be a safe pick, as he's annoying for your lane opponent, and easy to not give kills with.
I would highly recommend only focusing on about 3 Champs at a time. And maybe having a safe pic like lulu in case you don't know the match ups
