Schumacher is the most succesful F1 driver, not the best.
I think that's unfair to say. He's definitely amongst the best. Even if he hadn't had such dominant cars and clear, untouchable #1 status within a team, he still could have pulled off several championships. It wouldn't have been seven, but it would have been more than one, easily. He was a skilled driver, it was just masked a lot of the time by his tendancy to cheat which, unfortunately, meant that so many disliked him.
I agree. Schumacher was clearly very, very skilled, and he would definitely have won several championships regardless of went on at Ferrari. I've a lot of time for Schumacher, for he was always up front about his desire to win, never complained when people did the same nasty things that he did to others on him, knew what he wanted and was prepared to seize the opportunities with both hands. Do I think he's the greatest driver ever? No. Has he inspired or influenced me in some ways? Nowhere near as much as Ayrton Senna did/does, but he's definitely contributed. People don't have to like Schumacher, and he's given people a lot of reason not to like him in the Formula One circus, but to say he had no skill and did little for Formula One is madness.

Ayrton Senna: WDC 1988,
1989, 1990, 1991
McLaren: WCC 1974, 1984, 1985, 1988, 1989, 1990, 1991, 1998,
1999, 2007McLaren: WDC 1974, 1976, 1984, 1985, 1986, 1988, 1989, 1990, 1991, 1998, 1999, 2008