Richmond Flowers. For this game he would be perfect. His turning back on Alabama and being a track and Football all american here. He may be old but would be monstrous education for the world of what a quality person he is and his family.
A bit more unconventional (and would likely never happen), but I’d love to see either Josh Pate or Big Cat (from Barstool) be the guest picker. Rationale: Both provided some hope (and hype) during the past couple of years and they are both more in the business of “pick-em’s” (after all, it is a “guest picker” for games).
I'd like to see Bill Dance as a thank you for his extended dedication to Tennessee. I think she's too big for the show and doesn't have any UT connection whatsoever beyond living in Tennessee at various points in her life, but Taylor Swift has an album releasing on the 13th and I don't think there's anyone who would garner quite as much excitement as she could.