What kind of team mate would your rather have?

I am no way trying to sway the viewers opinion on this subject. The team mates I'm describing are in no way affiliated to me. All I want to do is raise a question that not many people have asked before.

In game I often see people arguing about the outcome of the match One player will comment, "you're so bad" and another will retaliate with "you're so toxic" and I was think that those aren't exactly opposites. And it got me thinking that, in a competitive sense, which person would I rather queue up with? So,

Would you rather?

a) Have a player on your team who isn't good and needs to be carried to win, but is pretty friendly and all around a nice guy. He is over extended without wards and dies to ganks, but doesn't rage at the jungler to come top. He loses lane and loses first turret, but says sorry and actually tries to improve and adapt mid match. He helps where he can when it comes to coordinating with the team, but never really gets much done. He will sometimes hold ultimate and lose teamfights because of it, but listens to the team when they offer critizism to his play.

or

b) Have a player on your team who is overall better than everyone else in the room, but he is narcissistic and will verbalize his frustrations. "So bad, " and, "What the fuck are you doing," are some of the things he says, but to a degree he's right about the situation at hand. He doesn't die to ganks unless 3 come top and dive him (and even then at least one dies with him), but he gets annoyed and throw out a rude comment to the jungler in chat. He commonly gets first blood turret/kill, and has good objective control, but will flame a team mate that is out of position, has bad objective control, or when the jungler misses smite. He will often swing unfavorable team fights in your favor and push leads, but when criticized will tell you to "fk off."

I'm just curious who most people would rather have. Personally I'd prefer someone who was somewhat toxic but could hold is own opposed to someone who always needed to be carried. But that's just my opinion and everyone will say different things according to their role and play style.