You'd prefer Ayon over Tomic?
If were talking about Bigs that dont jump much, i prefer Kevin Seraphin over Ayon tbh.
I definitely like these players over Ayon too;
Ekpe Udoh
Jeremy Tyler
Cole Aldridge
Andray Blatche
Ante Tomic
Have to pay a buyout to get Tomic over.
Udoh sucks.
Tyler sucks.
Aldridge sucks.
Blatche would cost too much?
Ayon just seems like a perfect backup to me. I don't know where you get this "He wants too many minutes to preserve his career" from. He is a better player than all of those you listed (besides Blatche and Tomic). He is a dude who is going to come in and play solid basketball and not hurt us with bad decision making or selfishness (unlike Blatche).
Think Ayon would cost barely above the minimum too.