I think Gortat would be really great because he can hit mid-range jumpers, play solid defense and, most importantly, he's great in the pick n roll. Right now we don't have anyone who sets great screens and is good in the pick n roll, which Damian would be great in because of his great shot and handles.
It would be nice to have something so bread and butter to go to, while Maynor is awesome at feeding LMA in the post, which Lillard needs to improve on.
IF Channing could come back, he's actually improved his post defense a ton, and would be a great floor spacer with Gortat during the pick n roll OR when LMA is posted up on the block.
The leftover minutes would go to Leonard for a very solid 3 man rotation in my mind. Leonard should model his game after Gortat too, with his wide frame and athleticism he coudl be a very good pick n roll player on offense.
LMA could always have the post to work in, and wouldn't need to defend the other teams bigs and we could take advantage of his great ability to defend pick n rolls at the top of the key rather than JJ, who is terrible at it.
Lillard/Maynor
Matthews/Lillard (when next to Maynor)
Batum
Aldridge/Frye
Gortat/Leonard
All we need is a reliable backup 2/3 man with a nice shooting stroke and defense and I think our rotation would be fairly well set. Honestly I think Martell Webster could be a nice fit there, but only if you give him consistent enough minutes to get into a rhythm.