Which combatant has had the LEAST on-screen/page material to work off of?

I was thinking about Death Battle combatants we’ve seen so far and I’m curious as to which character has done the least on-screen to show off their combat ability or what sets them apart from other characters in a fight. This isn’t necessarily about feats/lore disparity, as with some characters there’s a ton of stuff you could glean from what they do on-screen even if it might clash with the upper limits one could calculate from a lore statement or “fought a guy who fought a guy”-type stuff. So most video game characters are probably out if they’re a major playable character. This is more a case where you could watch every scene a character is in on mute and feel like you still don’t have a good estimate of what they could do in a fight.

Bardock was the first to come to mind at least relative to a lot of characters in his own series since most of his material comes from one TV special though there are probably bigger cases. Maybe Zelda, at least for when her episode came out, since I think that was before even Hyrule Warriors so outside of Smash she hadn’t seen that much action.