Celtics should relish the fact that Harden has the Cs on his list. This guy is a tremendous player. If he wants to be a Celtic, you probably have to make it happen.
Honestly, I think I'm coming around to this point of view given the fact that no other teams have appeared to offer their young guys (Simmons, Adebayo, etc.). If it was at all possible to get Harden without giving up Brown you do it 100%. Trade Kemba to a third team, then assets from the third team goes to Houston alongside some young players and picks from us to Houston. That would be ideal.
I'd even give up Kemba and Brown if we could turn that into a big man upgrade + Harden. Something along the lines of this kind of megadeal:
https://tradenba.com/trades/OUujxryzxBoston receives: James Harden, Julius Randle
Houston receives: Jaylen Brown, Robert Williams, Romeo Langford, NYK 2021 1st, Boston 2021 1st, Boston 2023 1st
New York receives: Kemba Walker
Our rotation would then be:
James Harden / Jeff Teague
Marcus Smart / Payton Pritchard
Jayson Tatum / Semi Ojeleye / Aaron Nesmith
Julius Randle / Grant Williams
Tristan Thompson / Daniel Theis
Deep bench of Edwards, Waters and Green. Could still try and use the TPE for someone too.