Only one I can think of off the top of my head is Bobby Digital. Night and day diff from RZA on Wu music.

Every other alt ego is the same s*** as the rappers original do

Logic - MF DOOM

Flying lotus and captain murphy
Madlib and quasimoto

J Cole and kiLL Edward

Lucki and JUICE WRLD

Biggest one is probably logic’s famous alter ego: MF DOOM

Tupac -Macheveli

Eminem Slim Shady Marshall Mathers B Rabbit The White Guy From D12

cheat code

rick ross - rozay

youngboy and kentrell

snoop lion

jeffery - s**

future hndrxx

delusional thomas

take a look y’all

looks good to me

lucky you were quick wit it

can't match someone on some blow

Quasimoto?

MF DOOM/VIKTOR VAUGHN/KING GEEDORAH

I still cannot believe this is real

Lil B / The BasedGod / BasedDemi God / Captain 66