Gap Close, Auto Attack Champions.

I have recently started leveling up a new account, playing jungle, and I have noticed a trend that goes on with junglers. All of the most braindead champions are the best to carry with. Perhaps it is just this patch, but all of the champions with the same combos, gap close and auto attack, are winning the games left and right. Why are all of these champions allowed to get a few kills and able to carry a game? And why are all of these champions just copies of themselves? What do Xin Zhao, Master Yi, Udyr, and Tryndamere have in common? Gap close, auto attack. Each one of them has a the ability to get to their enemy quickly and auto attack to death. Where is the skill? I can see Riot having these champions for new players, but why are they the best? Why can a Master Yi with a 2 kill advantage carry the team by simply auto attacking for 1/5 of your health? I, and a lot of other players are getting really tired of these copy and pasted skill less champions that a ruining the game.