Just throwing this out there to add a different name to the mix, but if we really wanted to make a splash, we could make a play for Buddy Hield. He makes $24M next season, but is signed for 4 years and his last season is only $18M (declining contract). Literally just last year, some people were wondering if he might be better than Jaylen. While this take hasn't aged well, he is a fantastic scorer and shooter from outside.
I realize this would likely require Hayward (unless we wanted to cobble together say Smart and Kanter) so I imagine people will say, 'why not just sign Hayward to a similar contract?' And I get it and probably agree, but Hield is younger and doesn't have the same injury concerns as Hayward. Reportedly the Sixers are interested in using Horford and either Shake/Thybulle to bring in Hield, as well, so it would prevent them from greatly improving their team composition.
Edit: Oh, come on NKY. I spent several minutes getting details on Hield's contract and checking Reddit for reports on the Horford/Hield thing and you just come in and say what I did in a way more concise manner. TP to you for beating me to it.