I understand that regional bias plays a role. I understood that before I asked the question.

I thought Army vs Navy would get some response. I do think it is proably the second biggest rivalry.

I have noticed some votes for Florida vs Georgia. Great rivalry but not even the best in the SEC. In fact I would rate it below Tennessee vs Alabama, and maybe even below Miss St. vs. Ole Miss. Florida has so many rivals: Fla St., Georgia, Tennessee etc..

The question was and remains what is the greatest rivalry in college and pro sports? No matter the sport of location.

I would suggest if you are interested, look up Lipscomb vs Belmont now that is a fierce rivalry.