Actually Medvedev has a huge headstart, more than 2000 points above Tsitsipas in terms of race to post-RG. I think it's Thiem-Medvedev fight for #3 and Zverev-Tsitsipas fight for #5, not that it changes much in seeding.From Berrettini to Kachanov its about 1000 poits. KK is at 17th. All these guys have a good chance to reach top10.
Tsisipas and Medvedev will fight for the 4th until Federer returns.
Sasha is the only one that hasnt much upside to winning.
Its a given Federer will drop to around 4000. My bet would be 8th, 9th at worst.