i feel like i've made this exact post before, but nah man. drums very much not atonal. cymbals, kicks, snares can/should be pitched until they sit better in the song. studio drummers have their kits tuned like crazy before recording.
this is as realistic as it gets here.
this is one of the most overlooked part of drum program building, and one of the first things one should do when dropping a drum sample into a melody. a drum isn't pitched "correctly" from the get go - if it's from a break from a song, those drums have been tuned for that song. if it's from a oneshot folder, who the heck knows where it comes from (or where it's been)
BUT as the above posters stated, it can be a very good idea to mess around with the drums' pitch to improve how they sound on top of the sample, but NOT necessarily till they match the sample's pitch.
that's the point, though - they won't sound good until they DO match the pitch in some way or another.
if you put a drum sound into an autochromatic pgm or inst pgm, you can play mary had a little lamb with it and people will instantly recognize the melody. this is evidence that drums do have a tone and this often makes a LOT of difference in how they sit on the sample/melody you've written.
furthermore, with layering, this gets doubly important - suddenly you don't have to think of just one drum hit's tuning, but two - and the relation between the two.
drum tuning is much overlooked.
