Kanye gonna make him big just like Paul McCartney.

Pfft, he's good, but I didn't mean he's KANYE good!

Kid's gonna need a lot of Illuminati training before he can roll in the big leagues with our future president, Kanye.

I believe that's an MRA

There aren't a whole lot of Welsh rappers, are there?

https://www.youtube.com/watch?v=3OckWKBaMj4

he puts the rap in chinstrap

Yes, but what can you rhyme with Llanfairpwllgwyngyllgogerychwyrndrobwlll­lantysiliogogogoch?

Well!?!?

HRRRRGGAAAAAAAAAAAAAAAGTPGHGHERHPFHFBBBBBBBBBBBBBB

Aww, look at the pasty, doughy hat boy and his tennis friends!

Stanfairpwllgwyngyllgogerychwyrndrobwlll­lantysiliogogogoch

You wouldn't have to rhyme the whole word, just the ending, "-goch". That's a little problematic, because the final phonetic sound of Llanfairpywll' (the Welsh 'ch') does not occur in standard English. It's technically known as a voiceless uvular fricative, and sounds sort of like a "k" or "ch" sound made by someone who's clearing phlegm out of his mouth. You could try to rhyme it with words in a language other than English (German and Dutch words sometimes have this sound), or you could simply take liberties with how you pronounce the final word in your rhymed line. For example:

Coke
Rock
Talk

... could all be reasonably rapped with Llanfairpwyll'etc, so long as you remember to deliver the word in a mush-mouthed manner.