Champs that actually need buffs: Fiddle
http://na.op.gg/champion/fiddlesticks/statistics/jungle Where my stats came from.
What if I were to tell you that a champ wins roughly 1/3 of the games they play? You'd be surprised I'm sure.
That champ is
.
35% WR and 0.73% pickrate according to OP.gg.
I know, this only shows plat+, but I mean you would think that a champion would be able to win at least 40% of the games they play in high elo...