Yeah, I think your "go-getter" works just fine and dandy here.
He is such a 'go-getter' (such a driven guy), he always achieves what he wants.
Also, even if you lose a bit of the "color" of the original Spanish, you could try with something like,
He is a so entreprising and effective guy, that he always gets what he wants to get.
He is a guy always right on the money, he always hits the bullseye. Or,
he is always on target and gets what he wants... 