Tom Herman would get a pretty good look
If he is successful at UT, it is a bigger job than Bama.
He also has roots there, with a masters at UT and prior coaching there. He has no connection to Bama. Generally speaking, a dude that names his son "Maverick" is not the best candidate to move to Bumfck, Alabama.
I think Riley will have a pro gig soon enough, and be too happy getting his NFL pension to go back to the recruiting grind.
My ideal scenario would be for them to go after the Samford boy Jimbo Fisher right before anyone outside realizes he burns all his ATM bridges. The Bama alums say, "Hey! The Bear came from ATM!" ATM craters cuz that is what Fisher leaves, and Bama falls from grace as if they were coached by a modern day Mike DuBose or Mike Shula. That would be pretty tasty.