Dolly would be a good choice since it's different than the typical "Bro Country" dude or former athlete/coach that typically makes these choices.
If you roll out Morgan Wallen, for example, no one nationally will care 5 minutes later since he another one in the long line of Bro Country dudes to do it. If you roll out Jason Witten, no one will care 5 mins later since he will be another former alumni to do it.
The reason why Katy Perry's guest picker is the gold standard is because it was different (and she was shitface wasted while picking)