1. Mile Pence (2025-29)
2. Beto O'Rourke (2029-37)
3. Ben Shapiro (2037-45)
4. Dan Crenshaw (2045-49)
5. Alexandria Ocasio Cortes (2049-57)
Or
1. Kamala Harris (2021-29)
2. John Bel Edwards (2029-33)
3. Ron DeSantis (2033-41)
4. Elise Stefanik (2041-45)
5. Alexandria Ocasio Cortes (2045-53)
AOC would almost surely be 2028 nominee vs. Pence if establishment Democrats still haven't broken through after 3 terms.
Beto will almost surely be old news 10 years from now if he's not already the VP. He needs to either win outright or get VP in 2020, or win TX-GOV in 2022 and then win outright in 2024.
First of all if that is the case, we better get ready for 8 years of President Pence. Second of all Alexandria Ocasio Cortez will be old news by 2028. She'll probably run in 2024 and lose the nomination or get crushed in the General Election.