I've listened to DOOM & Uncle Larry extensively, never really listened to Roc so I can't speak on him
but pretty sure I was the 1st mf on here makin Larry June threads 6-7yrs ago
w/ that bein said
MF DOOM is the better technical rapper (metaphors, rhyme schemes, flow, etc.)
while Larry's music is a lil more digestible, straight forward & not too complex
I prolly listen to Larry more tho jus cuz it's very chill, groovy tunes to ride to
whereas I gotta be in the mood to hear bars for DOOM
2 vastly contrasting styles but still great music between them