Who Are the Strongest Characters Each JoJo Can Defeat?

To clarify, this is not a ladder or gauntlet. I want to know which individual characters every JoJo can at least 6/10. Arena is the streets of Cairo, starting where Jotaro and DIO began their face-off. Opponents can see Stands.

R1. Jonathan Joestar (End of Part 1)

R2. Joseph Joestar (End of Part 2, has both hands)

R3. Joseph Joestar (Part 3)

R4. Jotaro Kujo (Part 3, No time stop)

R5. Jotaro Kujo (Prime, with time stop)

R6. Josuke Higashikata (End of Part 4)

R7. Giorno Giovanna (No GER)

R8. Giorno Giovanna (with GER)

R9. Jolyne Kujo (Part 6)

R10. Johnny Joestar (Part 7)

R11. Josuke Higashikata (Part 8)