Continuing on from the previous post, with some suggestions from the community!
The Fumbler: It’s common knowledge that a jungler can make or break a game. This guy breaks them. He fumbles the jungle like Gollum fumbled the One Ring, dying at blue / golem / wraiths (??). Some scenarios have Warwick leave the jungle and try to take mid from Fiddlesticks.
The QQ Factory: Almost rage, but not quite, as they release a constant stream of passive aggressive whinge. Berates every team member for not helping him push an unwarded mid as Evelynn, and generally gets on all your nerves.
The Switcharoo: Fails hard in lane, then spends a minion wave worth of time hopping from bottom to top, only to plant his ass in the brush while top sits there going “WTF are you doing here?” Proceeds to fail hard in top, and snowballs into a feeder.
The Glue: This dude is the jack-of-all-trades; ganks a bit, wards, calls out MIAs, performs well in team fights and generally passes around encouragement and congratulations. He might not be the best at playing his champs, but he and his morale boosts will win your games for you.
The One Hit Wonder: One champ, and one champ only. If they’re a Progressive One Hit Wonder, then they’ll play one type of champ. Got two carries already? Too bad, have a third, coz they’ll either queue dodge, leave or feed.
The Kenny McCormick: Likeable dude, pretty good player… but always, always, always stuck with a team who can’t help him out. Gets his ass handed to him, and has the largest losing streak of all his friends. ELO Hell? Yes, it exists.
The Derp: Team fight mid? Never fear, Soraka’s jungling! Generates the most WTFs in the entire team.
The Stream: Never shuts up. Goes on and on, and if you have him on voice comms, then all the better. For him. Will sing from time to time, and make odd noises that really creep you out. Bonus points if you manage to catch him talking in a girl voice.
The Hudson (get the reference?): The other team gets first blood? Game over man, game over!! This is the dude that types “GG” on All Chat whenever a teammate dies. Reactions to him can be varied, but are usually followed by a shake of the head.
Captain Failhard: Self appointed leader of the team, this guy spits out orders like a phlegmatic spits out, well, phlegm. Thinks he has the strategic capacity of Jean Luc Picard, but actually has that of Peter Griffin. Hard to play with this type, since they can morph into Raging Lunatics, and is usually the guy pinging Baron Nashor 100 times per second at level 9 and slowly driving everyone into the depths of insanity.