Milk but he's from Boston (thanks Rotisserie)

you don't need to
they're literally immortal

Not canonically

I'm going to use the Gravel War era mercs, before the reanimator

oh

Because in the comics, if they died, they were gone for good, except they never died

Well, Sniper did, but Medic revived him through surgery
And Scout, but God sent him back to Earth because he was still a virgin
And Medic, but he tricked Satan into letting him back to Earth