Unlimited funds and resources? Arthas all the way. But I'd hire a fucking professional to make the armor real, the sword real, the cloak real, everything. Get a fog machine for my helmet and sword, have LED lighted glasses to replicate the eyes, even have the glyphs on the sword glow. The fur on the boots and (I think) shoulderpads would be real bear fur, and the whole damn thing would be ready to walk into battle.
Either that or War Machine, again, with everything real. Chaingun and RT might not be possible, but the other guns are more than possible, and just stick jets to my boots, since War Machine, in the movie, didn't use repulsers to fly. But I'd prefer Arthas. It's more probable, and less likely to blow up.