Of course, I couldn't agree with you more on Logan Morrison. I think he's going to be a very good NHLer.
If I was going to look for an under-the-radar, low-trade-cost option to give a shot as 4C, I would certainly give a look to Alex Turcotte, who has really been buried on the Los Angeles depth chart and, in my opinion, not developed particularly well by the team.
Turcotte is a terrific skater who plays a high-compete two-way game. It's highly unlikely he ever develops into the big-time, top-six scorer LA envisioned when they drafted him #5 overall, but he's looked very good in the AHL this year in my opinion and is NHL ready.
The Kings top organizational need right now is probably LD, where the Devils just happen to be organizationally pretty deep. Another interesting factor is that Jack Hughes and Alex Turcotte are apparently pretty close friends. A realistic trade scenario would be something along the lines of Misyul + Bowers + mid-round pick for Turcotte, which is certainly manageable. The Devils would have to offer a bit more simply because of the optics of trading a former #5 overall pick, but I doubt it would be too heavy with Turcotte unlikely to get a shot to squeeze into the Kings' C rotation of Kopitar/Dubois/Danault.