I am not sure how to rank the Championship teams, since there are so many.
RTR
My personal favorite, as a fan, is this one that just happened, for many reasons. The players, the chemistry, the fact it was during a pandemic, being undefeated, having a Heisman winner, all the other awards, etc. Sark, Saban, having coaching continuity for 2 years, etc. This team was on a mission from the minute Najee and Devonte decided to come back.. really since the LSU/Auburn losses last year.
Tua's 2nd and 26 is probably my next favorite since it seemed impossible to win for the first half of the game, but also since I was actually there to witness one of the best plays in Bama football history. It was an unbelievable, awesome night. The fact it was against UGA made it even sweeter.
Another high on the list is 2009 just because it was Saban's first at Bama and it had been a long time since the last championship.
I was also at the championship game vs Notre Dame in Miami. It was my first time to attend a Bama National Championship game. I loved the blowout score and the fact that the Notre Dame fans sitting next to us drunk left at halftime. RTR
Finally, any time Bama can beat Clemson is great in my eyes. They had a great team that year but Bama prevailed.