I think when the team makes a trade this season it has to bring in players who can readily contribute without compromising the core (Tatum, Brown, Kemba) as it pushes to perform better/deep in the playoffs.
Two players I have in mind are Raptor Boucher and George Hill (currently with injured thumb which I hope is not serious and would soon heal). Boucher is a major help in defense wherein he could take on SF/PF scorers (i.e. Lebron, Kahwi, KD, Giannis, Tobias, Barnes, Randle to name a few). A very good shot blocker and defender (one on one and on helping the weak side). I dont know how Danny can acquire him but I think he could really be very valuable. He may not be really cheap to acquire but the price maybe within reach.
Veteran George Hill, a 6'4'' PG, is a very reliable playmaker and 3-ball shooter. Cool with above average composure.