It's not quite a singular person, but maybe that actually makes it more impressive. I'd say that The Source is no longer relevant at all thanks to Eminem going against Benzino.
Humiliation aside, I think that what Kendrick is trying to do is to make Drake look like such an imposter to the genre that he fades into obscurity, and is no longer relevant.
Only time will tell whether Kendrick is successful, but if he is successful on a level like Eminem was with Benzino/The Source, then Drake will just be a popular figure from a bygone era.