Most genre fusions have a lot of untapped potential versus what I can imagine in my head. I figure there's a lot of crappy metal and a lot of crappy hip hop out there, so the chances of someone combining the best of both is extremely slim. They always make the mistake of settling on a homogenised sound midway between the two and impress nobody in either camp. I imagine it'd be way better if a band laid down a great boom bap track and a a great metal song separately and then figured out ways to interweave the two.
I think One Minute Silence holds up best from the nu metal era:
Recent trap metal acts such as Ghostemane have a few tracks with metal appeal, so they're helping to unlock some kind of potential:
Lastly, I'll leave you with a weird old Bloopy favourite that switches back and forth: