Nothing wrong with being a Bridesmaid of course. Most of my favorite...nay ALL of my favorite characters could be classified that way.
Joining Martian Manhunter in that particular tier, is none other than Oliver Queen, the Green Arrow. A member of the Justice League, although not a founding member. Originally conceived as a Batman knockoff, with his own Arrow-Cave, Arrow-Car and plucky sidekick. Ollie was actually rather bland, all things considered way back when. Then they decided to give him a cause and a lot of liberal guilt. He got a lot more interesting, although he really DID tend to call poor Hal a Nazi waaaay too often.
Ok, he's taken a few people out over the years. Permanently, but man...they DESERVED it! That old Justice League is just too judgemental. Things are always a lot less exciting when Ollie isn't around.
Ollie is for the "little guy", and abhors the "fat cats". He also can't seem to keep it in his pants, and has a way of messing up his private life with dull regularity. But what the heck, he's fun in a bizarre sort of way, especially when he starts ranting. And who wouldn't love someone with a boxing glove arrow, a tiny vacumn arrow, and a dead cat arrow?
Not the women, apparently. He's got Black Canary, although they seem to be on the outs lately. But that won't last. He's got a couple of sidekicks, and a slew of illegitimate children, but that doens't slow him down. He likes to play Robin Hood and he shoots people with pointy sticks.
He may be a Bridesmaid, but he's the kind of Bridesmaid that has a HELLUVA good time at the wedding.