I've seen plenty but the one that keeps coming back to mind is a seven year old kid with a rinnegan who somehow blocked a genjutsu that was sound based, a kunai barrage, and a ninjutsu all at the same time without having all of his powers. Nothing else comes to my mind but I've seen my fair share of them. In all honesty characters who start off uber strong disgust me unless the roleplay has a reason for it in plot or the roleplay is meant for those sorts of characters. Even my strongest characters have weaknesses. Take Paul Lyons from my gundam roleplay. He's a coordinator (enhanced physical capabilities as he was genetically born that way as are all coordinators) and has unlocked newtype powers (ramping up his abilities even FURTHER). However he is in all relatively mid tier suits if that. He also deeply relies on his powers to get by using them as a crutch and without them he'd be a serviceable pilot at best. The only time I ever use a stronger character is if I'm in a roleplay where a weaker set of monsters aren't as good as they need to be in a fight or whatever the case may be. I also have a deep rooted caution of new players that join my roleplays because there are a lot of people out there who want to be that one guy who's the strongest in a fight out of the entire group and in my opinion no one should be that guy at the start of the roleplay. Maybe later if the situation calls for it but having that defacto one guy to run to is something is about to hit the fan and it also detracts from other players characters.

But hey this is just my opinion on the matter.