At 4800 I'm considering many options, however after free weeks I found out two things. I suck at 
, 
,
and 
. Oh well, some champions I suck as. The second thing is I'm an indecisive child in a candy store with all these champions that look good. So I have a few champions I would like to get, but the one which would help me in the long run is what I wish.
TLDR; I need help picking a champion that would be good.
Anraton1 votesBad new ... I don't know you ... my advice wouldn't be valid ...
Take a look here http://boards.na.leagueoflegends.com/en/c/gameplay-balance/ENEGdmpR-advice-one-what-champion-to-main-topmid?comment=0002
then come back and ask again.
Asudurga1 votesI'm an aggressive player, I prefer being right up in the enemy's face to deal as much damage or lockdown as possible. My main roles are top or jungle, my backup roles being support or mid lane.
TONY IS SO HOT1 votesI don't see why people don't like Gnar, sure fiora counters him but just ban her, abd only irelia would be a problem, but since she's rarely seen, I don't see why Gnar is not a viable pick
Asudurga1 votesI own him, he's a monster in teamfights and I love this guy. Only one who from my experience who messes up Gnar hard is Darius.
TONY IS SO HOT1 votesOk, i'm a 180K Gnar, and what you said is totally correct, team fights are just the funniest things ever when you E in than ult ever on into the wall, is just the funniest thing in the world, but daruis can give gnar a bad time when Gnar trys to auto him three times, but besides that if he is played right, than he can do great things, e.g. I was 2v5ing with a kal and I had ult up, so I E in and ulted them all into the wall and since kal had 
so she was ripping them in half.
Asudurga1 votesYep, also his mega stage is where he ironically becomes weaker in early laning because champions with all-ins could simply shred him down if they built proper items or utilised their skills properly. Examples like 
Q + R, 
E, 
E + Q, 
(yes, even Singed can deal with Gnar easily because of how tanky he is in the late early) and from what I've seen 
W + E + QQQQQQQQQQQQQQ
Phenyxs1 votesI would get cass. Out if that group. I have also asked on here for advice with champs and good response but basically comes down to your play style. Ap or ad or ad or support. Also if they been nerfed or not. But I would say for sure out of those you listed, Cass is best and safe bet and fun. Plus she is free to play this week try her out and if you like her, buy.