Well, Roland did get various samples of certain models of their drum machines taken down claiming that PCM samples and/or the output of digital algos are copyrighted, but... use of one-shots in a track, I don't think that's ever been litigated. So, anything's almost certainly safe to use as far as drum samples, without having to check provenance and get clearance, even if, say, some snare is actually "liberated" from Superior Drummer in violation of the EULA.
But to try to ask something else... is this hip-hop for a specific rapper, hoping to sell beats to unspecified rappers, or for use in a soundtrack or some other non-rapper client? This matters in terms of whether you need to nail a specific vibe and use style-specific sounds to make that easier, or if you can just
doowhutchyalike. Especially considering that compared to most of the music aims for a lot more realism, you might need to avoid that much realism. For example, round robins and dynamic layers in drums are good if you want to make it sound like you sampled a loop from some Motown record that doesn't really exist, but if you want to sound like you cut one snare hit and used it throughout the track, or want the machine-gun trap hi-hats, then you want a one-shot.
Might also want to use a different workflow, like playing in some of the drum loops from pads or a keyboard. And stock up on saturation effects, including vinyl emulation for the more old-school vibes.