Hussar
Legend
Sorry, that's goalposts on roller skates.It's not like they ever could quite out-fighter the fighter (they didn't have the feats for it) when people claimed they could, nor that being able to fake-tank was ever an important part of what made them Tier 1. Strict superiority can be proof of brokenness but it's hardly a minimum requirement.
Concentration is oft-cited, but, really, is just 5e keeping buffing BA-compatible. A concentration spell can often swing a combat the way a whole raft of complicated 3.x pre-casting would have been needed to. Ultimately it means you need fewer spells to make the same high-impact sort of contributions.
If you think a single concentration spell has the same impact as the shopping list of effects a 3e cleric could lay down, then, well, we have no points in common here. I get that you want to "prove" that the classes in 5e are massively tiered, but, honestly, you're very wrong here.