Kong Skull Island, the EP queue is pretty unimpressive, just a series of hallways with some skull on top of ledges, nothing memorable. Same with Mummy ride, so I can imagine that those two standby lines might have more to see. With Escape from Gringotts, I was very surprised at how unimpressive the overall queue line experience is. I believe both standby and EP use esentially the same route. Walking into the bank is pretty cool but basically you just stand in a hallway with little to look at until you get to the film room and then the elevator. So I'd say Forbidden Journey, Kong and Mummy might be the three biggest.