Qorvex. Can be insanely tanky but can also be built for insane clear, can also have good CC, and can have great single target damage with damage amp and armor strip. He can literally do it all.

Further elaborated:

His base armor is the highest in the game, by far. If you want to be extra tanky, toss all 3 umbral mods on, use adaptation, quick thinking, and the arcane that gives you energy based off of armor. Bonus points for rage and health regen. The only thing that can kill you is a rad proceed player or the last tick of a jade eximus beam, because that doesn’t seem to do damage, it just kills you outright.

Clear wise, his 4 is absolutely nutty. Every target hit by the beam does an explosion of radiation damage, and that radius scales with ability range, and his 4 has crazy punch through. So, if you fire it into a crowd, every enemy will get hit with the damage a number of times equal to the number of enemies close by. “But that requires enemies being grouped!” I hear you say. Luckily, his 2 does that quite nicely. Additionally, his 1 honestly does pretty high damage, scales great with range, and doesnt require building duration.

Cc wise, his 1 is great, slowing enemies and rad proccing does well for CC, and his 2 is great as well.

Damage wise, he has an augment that lets his 2 armor strip, and makes enemies take more damage.

He’s an absolutely terrific frame, 10/10 highly recommend