8. Rob Schneider
The fact that Rob Schneider has a career in entertainment is one of the most perplexing things you are ever likely to hear. He has no apparent talent, but after stints on Saturday Night Live and jumping on Adam Sandler's back, he has been a staple in comedy movies over the last decade. Schneider is worse than Sandler and his contemporaries for he simply has no redeeming qualities. His clear lack of a sense of humour is defined by the way he acts in response to negative reviews - if you're lucky, he'll only call you nasty things in the press, but if you really annoy him, he'll take out a full-page ad in Variety mocking you with incorrect facts. It's a mystery how Schneider was allowed to work in Hollywood in the first place, but it's gone too far now, and some Hollywood executive needs to see the error of their ways.