My 2 dark horses for VP - Tom Cotton and Marsha, Marsha, Marsha Blackburn.
Cotton attended the NeverTrump meeting at Sea Island, GA the first weekend in March. Just so you know.
I like both of them. One I had thought of and don’t think I have ever mentioned is Jim Jordan (R-Oh). He was on the bengazi committee and IIRC was thought about as a potential speaker of the house.