Those are the 2 most supreme people for consideration for a "World's Worst Rappers List".
I'd like to include horribly offensive and disgusting people like Eminem, but he's a really great rapper. I'm only going on skillz.
Will Smith may be incredibly popular and commercialized, but some of his early songs, for sure, were not bad. Especially songs from "He's the DJ, I'm the Rapper".
1. master p (wont even mention anyone else on his label..hes the best one)
2. chingy - a fake ass nelly
4. bizarre from d12
5. ja rule
6. 50 cent (NOT g unit)
Vanilla Ice, Soulja Boy, Master P, Nelly, Chingy, Juelz Santana, Lil Wyte, Bubba Sparxxx, D4L, Dem Franchize Boyz, Lil' Wayne (way too overrated for crapper), Akon (his lyrics are complete bullshit), Kanye West (another bullshit rapper; one of biggest hypocrite rappers out there today), ICP, Benzino, Ja Rule, Camron, T.I. Yung Joc, Young Jeezy, Pitbull, V.I.C., K-Fed, Bow Wow, Jibbs, Diddy, Fat Joe, Rick Ross, Birdman, E-40, Daddy Yankee, Mike Jones, Lil Kim (whorish, completely unreal), Lil Mama, Hurricane Chris, Ying Yang Twins, Eastside Boyz, Lil Boosie, M.C. Hammer, Kid Rock, Limp Bizkit, Ludacris, Missy Elliot, Shaq O'Neal, Kobe Bryant, Tony Yayo, Lloyd Banks, John Cena (I'm sorry but this guy is WWE wrestler), Mannie Fresh, B.G. (not to be confused with BG Knocc Out, good rapper in 90's), Baby Boy Da Prince, Sean Kingston, Lil Scrappy, and any rapper named Gotti.
The worst ever:
1. Vanilla Ice
The rest of the worst:
2. M.C. Hammer (most of the time)
4. 50 Cent
5. Every single south rapper except for Outkast
6. Every single rapper with lil' in their name
7. Everlast (of house of pain)
8. Kid Rock, Limp Bizkit (if it's rap you want)
There are many more more, but these should make it for you. Especially with 5. and 6. Please try to avoid these rappers if you want lyrically accomplished rappers. Some of them might have style, but they aren't great rappers (50 Cent).