Think of something that could fight Samuel Lloyd moderately well.
It could be a tank...
A P-51 Mustang...
A friggin' army...
You name, I'll verse it against Hacker.

As long as its not a one-hit wonder weapon, like a nuclear warhead or a turbolaser or a vaporizer rifle.
Or Yoshiro and his inner circle. That'd be nasty.
Or Unit 414. That'd be nastier.

Besides the given things above, what would you like to see fight hacker...

Personally, I would like to see Hacker fight a division of Wehrmacht Panzergrenadiers.
Just imagine it... 1000 german troops running in, blasting MG42s and MP40s at Hacker. He just absorbs the bullets like they're nothing, and just whips out his M60 or his Dual Deagles and plain-out wastes the PZGs.
That'd just be plain funny to see...
Like friggin' Neo shit...

Oh, one thing to remember:
Hacker's not just strong, he's pinpoint accurate and has intelligence verging on genius-level...