Think I'm going to continue with the 50% Goku>Trunks.
Trunks was way above suppressed Cell, but Trunks was surprised that Cell was as powerful as Goku was making him out to be. That tells me that Goku, even at 50%, was the current highest level once he displayed his power. All of them reacted to Goku's power-up, though you can't really prove anything from that except Vegeta was much weaker.
Goku's full-power outstripped both Vegeta and Trunks 2nd rosat, and they should be above 50% Goku at the very least. Since I also have them above Grade 3 Trunks, then I'm good with 50% Goku being above Grade 3 Trunks. It makes the climb in power more impressive.