I don't know why people keep putting Aldridge in trades where he'd have to play the four.
Sure, the Celtics are undersized at the five, but what they really need is a big wing who can credibly guard fours so that Brown/Smart don't have to consistently go up a weight class.
The Cavaliers are obviously set with Allen and as a re-building team, neither side would have interest anyway.
The Trail Blazers only work if he's ready to accept a bench role behind Nurkic (granted, he's had recent trouble staying healthy).
The Nets (not the type they need though), Hornets, Heat (see Celtics, but Adebayo can at least cross match) and Raptors are teams that he could make sense for.