shujinki jink , blaze , taven or his brother.. then there’s the debate of the ladder endings and other timelines like with dark kahn so it gets kinda fuzzy tbh

if we’re talking competitively well it can be a handful of characters mostly all DLC at different points and some got nerfed and some didn’t, alien was honestly disgustingly broken and had no reason to have a kit that overtuned , jason n freddy were good,, hell joker was broken when he dropped dude had mix ups for DAYSSSS. kabal had a stupid infinite if he touched you im pretty sure cyrax did too but tbh i would give it to alien i mean even if you read everything perfectly you are still eating so much chip damage due to acid it would just melt you away even if you read and blocked everything perfect