Heh, it IS a matter of perspective, too.
In one group I'm playing:
I was, or maybe still am, depending on what the party does, playing a semi-min-maxed knockback crashing pouncing charger. I mean, he had 14 Int, but only 16 con, that was possibly a mistake. However, he could deal a lot of damage, in fact so much damage, now thanks to our WoC Bard, that the DM said it's hard for him to give meaningful encounters. Ok, he liked to put down few strong crittes instead of lots of weak ones.
In that same group we had aforementioned WoC Bard, who is actually probably the greatest group contributor, because he just says "YOU never miss". Honestly my charger would... suck anytime he doesn't charge without this guy.
We also have a Warlock, who is... well, let's say he might be starting to come to his own, but at present he's not a good contributor, his output in combat is just lacking, and his utility use is mediocre, because he never fucking USES his ability. Like being able to fly. I think the DM scared him by charging him with a flying critter once, and now he does't want to do it anymore.
We also have an illusionist wizard. Uh... this character just comes off as PISS weak. Even though by now he's starting to get the right spells. First, he's NEVER ever prepared. Ok, this is due to our lack of scouting. A wizard with 30odd HP, no scouting, and no AC is just a drag. He's a single hit target, even for many monsters.
And then there's the DMPC, who is a Warforged Stalwart Battlesorceror, apparently with a Fighter dip, going into Abjurant Champion, and by all rights he is probably the strongest individual character there. He just can't match my damage output.
But who comes off as the strongest? It is, just due to my damage output, usually me. While this character sucks, really, he's an efficient glass-cannon, that's all, whereas the supposed Tier 1 Wizard is really subpar, WAY behind his possibilities.