Vision.

Supercomputer brain, plus standard Superman-type powerset, plus density control.

The Watcher.

Scarlet Witch no question

Luke cage

Not really powers but I would like to have Iron Man armor

Iron Man and/or Spider-Man.

I'd want most of Spiderman's physical and mental attributes.

Strength, agility, and Spidey sense, Metabolism, healing, and intellect.

Black Panther, Scarlet Witch, or Iron Man Armor

Giah then I’d get basically all the powers

Either Scarlet Witch or Monica Rambeau