Portland: Portland gets a huge package with Dlo, Hachimura, Tucker and their desired 5 1st rp‘s. They have a good young core which they can build on and get a mentor for Scoot with Dlo to improve his shooting. Also the picks from the Sixers and the Lakers might be valuable later on for example because Lebron retires.
76ers: They get Dame who could be the missing piece in their squad to win a championship. Also Harden requested a trade so putting him in here is reasonable. They also get rid of a decreasing PJ Tucker who gets overpaid in my opinion. Of course you could argue that giving up 3 1st rp‘s and Harden is somehow an overpayment, but Harden is on the last year of his contract and as I already said, requested a trade.
Lakers: I just love the idea of Lebron, AD and Harden playing together. They not only get one of the best guards of the league but also someone who wants to win a chip at all costs. Harden could really help them to do so and is obviously better than Dlo.