no to all 4. any trades should be geared towards ADDING TO Jaylen and Jayson, not replacing one of them.
IF Brown were truly on the table, it would have to be a part of a package for a player that would be clearly better than Tatum such that the C's could be contenders for several years with just Tatum and that player otherwise, trading Jaylen is at best a lateral move and more than likely a step backwards.
I'd put Jokic, Doncic, Durant and Giannis at that level. If Embiid and AD could stay healthy, I'd include them as well. I'm on the fence abut Harden. I don't see Beal, KAT or Kawhi in that group much less Lillard and Simmons is a train wreck right now.