9 teams have made the college football playoff since its inception, 4 (Oregon, Oklahoma, Michigan State, Washington) of which did not have consecutive top 10 ranked classes. I am not saying, or even implying, that recruiting is not important. But I will argue, because history has proven otherwise, that 4 consecutive top ten classes are not a prerequisite for making the playoffs.
And none of them play in the SEC. Proven fact it takes more to go to the playoffs in the SEC than it does in any other conference. If Clemson played in the SEC they would have 0 playoff appearances.