all-time ranking on Spotify:

4 Billie Eilish
23 XXXTentacion
26 Post Malone
27 Olivia Rodrigo
28 Dua Lipa
34 Juice WRLD
40 Travis Scott
51 Marshmello
55 Doja Cat
60 SZA
81 Cardi B
83 Charlie Puth
85 Sabrina Carpenter
92 21 Savage
100 Halsey
101 Melanie Martinez
109 Lil Baby
127 Lil Uzi Vert
148 Khalid
163 Pop Smoke
171 Lil Peep
177 Playboi Carti
179 YoungBoy Never Broke Again
185 Lewis Capaldi
201 Morgan Wallen
205 Luke Combs
211 Polo G
212 DaBaby
218 Anne-Marie
225 Lil Nas X
226 YNW Melly
230 Alessia Cara
232 Kodak Black
243 Conan Gray
254 Roddy Ricch
269 NF
274 Lil Yachty
279 Trippie Redd
286 Megan Thee Stallion
301 Bryson Tiller
312 Chase Atlantic
317 Lil Tjay
319 Daniel Caesar
325 NLE Choppa
326 Lil Tecca
327 Gunna
330 Bebe Rexha
357 Rod Wave
367 Lil Durk
380 Central Cee

I'm counting 30 rappers and there'd be 31 on an all-platforms list (A Boogie Wit Da Hoodie and SuicideBoys replacing Central Cee/Bebe Rexha)