Oracle
Smash Master
There aren't a lot of characters in this game where you can simply omit use of a move and do just as well as you would have without it. Moves are situational; since this game's goal is to be balanced, all of the moves should see use when they're needed. Obviously some characters have moves that are very important to their gameplay, such as ike being slow without qd or bowser having no oos options without up b, but these are not the only moves that make them good, and if you over rely on them, you get punished for it hard (assuming a competent opponent).I guess it depends on what over-centralization is to you. The way I see it, a character can be overcentralized when a single move or two become so integral to their high level game that you wont win without heavy use of those moves. Their winning strategies revolve around those moves or use them as a platform.
tbh, I wouldn't even call, "being able to win with only one or two moves" over-centralization in itself. Its the result of 1or 2 moves being that good and the rest of the moveset not being able to keep up results in the over-centralization that I'm talking about actually.
It's like Roy in Melee. He revolved around abuse of dtilt and DED because those were his best moves, because the rest of his character was subpar. It was necessary to use these moves to win, else you couldnt.
What you're thinking of is the character being focused on one or two moves. Overcentralization is by nature a problem, since I think we can all agree having a single move that is so much better than the rest is bad for the game