Ok, I know there are not any figures with this combo (although special powers might make it possible now). I do know there are characters that can suck energy just by being in the area of someone to get healed up.

Now would this combo work, I am thinking yes.

(side question: Who would you say deserves it?)

Won't work

POISON (OPTIONAL): Once at the beginning of your turn, as a free action this character deals 1 damage to each opposing character adjacent to it.

STEAL ENERGY Each time an opposing character takes damage from a close combat attack made by this character, this character is healed of 1 damage.

Poison isn't any kind of attack, close combat or ranged.

Tarnish

It wouldn't work because Poison is not a close combat attack, which is required to activate Steal Energy.

Ding. that is the wording I was looking for, did not remember SE's wording off the top of my head, but thought there was an attack involved.
Well a special power will still work for the Aura of energy stealing.

For that I'd have said it'd have been good for Omega Red.

Tarnish