I am more on board with Ayton than OG for numerous reasons. I think Scoot could have a good impact on Ayton. It'd cost less to get Ayton. He wouldn't get in the way of Scoot, Ant, or Sharpe. There wouldn't be the risk of him leaving for nothing next off-season.
I think the best deal is something along the lines of this.
POR Gets: Ayton, Lowry, Jovic, 2024 1st Round Pick (Least Favorable of OKC, LAC, HOU, or UTA [via IND]), 2028 & 2030 unprotected 1sts from MIA, 2027 & 2029 right to swap with MIA
IND Gets: Herro, Wainwright
PHX Gets: Nurkic, McConnell, Martin
MIA Gets: Lillard, Hield
Portland takes a chance on Ayton but still gets the upside of Jovic and future unprotected picks.
Indiana apparently wants Herro.
Phoenix apparently wants McConnell. Martin makes sense and could start. Nurk replaces Ayton.
Miami can be coaxed into giving up more because they get Hield too. Maybe they'd even give up Jaquez to Indiana.