I think most stars would work well alongside Rondo and K-Love. Those two guys do a lot to help their teammates and are both pretty easy to play alongside.
Kevin Love needs a strong interior defender next to him ... but aside from that, I think K-Love can play with anyone. I think all perimeter players would love to play with a big man as skilled as Kevin Love. He does such a great job of opening up the floor for his teammates and punishing scrambling defenses. So basically, just avoid poor defensive centers.
Rondo can play with pretty much any type of big man and most perimeter players. The perimeter players need to be able to play both on + off the ball. Not someone like Tyreke Evans who has only been effective on the ball so far in his career. I think Rondo would work as well with Melo as he did with Pierce. So, just avoid perimeter players who can't play off the ball.
That leaves a wide pool of star players to choose from.
I agree mostly with this. Some star type centers who might not be ideal for defensive reasons that I could live with are:
Cousins
Gasol
Hortford (always liked him)
Even the current version of Al Jefferson and Kevin Love ( better than the old version when they played together)
Bosh (If Lebron left Miami he could go on the block. Maybe not a true center but I think would work well with Love.)
Our offense especially with our frontline would be awesome with any of the above guys and I could live with Green and Bradley starting (for now at least). If you signed a true defensive center backing up one of these guys a nice 3 big rotation could form.
If you went the other way with your star player being either a SG or SF aside from Melo it might be harder to find. Some could be:
Durant- I mean if OKC were ever afraid of losing him in free agency. Probably a pipe dream now and a year or 2 away from OKC even thinking it. Would probably take every asset Ainge has leftover under his belt.
Paul George- If the Pacers ever implode with West getting older, and Hibbert & Stephenson on shaky ground
Evan Turner- kidding
Eric Gordon- risky but only 25 and his career could bounce back a little. Would be a nice 3rd star.
Monta Ellis- If Dirk suddenly shows his age and the Mavs clean house.
from here it's really slim pickings as you have a bunch of young guys we would probably never be able to obtain at least for now like Thompson, Beal, and Derozan.
How about this for a twist. Say Philly picking 3 loses out on Wiggins (seem to be higher on him than Parker) and suddenly puts the 3rd pick on the block. If we can somehow move up with other assets to get Parker he could be our third guy if Ainge is hot for him (Seems to be. He saw him play at least a couple games in person). We would have a couple years to see how that mix works with Love only 25, and I see Rondo aging well with his smarts.