The other guy I think who is probably an underrated red zone threat by people is Michael Egnew. Now, I didn't like him at Missouri, didn't like the pick, but lost in the "he's soft" narrative is the fact that he's always been very good in 50/50 jump ball type situations. Always showed a lot of want to there. Look at his big highlight from the preseason, making a contested effort catch. That's really his bread and butter, not the seam threat stuff or showing a knack for getting open, despite his size/speed combo. Didn't see that at Missouri and don't expect to, though I'm always ready to be proved wrong and have a player turn out to be good.
Anyway, if Egnew is legitimate enough to put on the field at all one of the first packages I'd have him in on is split wide on 10 yard line and in type of situations (including goal line), just like the way the Saints use Jimmy Graham in that area of the field. Match him up man for man on a linebacker and safety and throw the fade or slant, depending on the defender and the pre-snap leverage. He could be very effective in that role, imo. He's an absolutely tremendous leaper for his size... having a 37 inch vert and 11+ foot broad jump at 6'5, 250 puts you in Calvin Johnson's class, though he's a bit awkward and lacks nuance. But I think if you throw it up there and let his physical ability take over good things will happen.
The other guy I'm intrigued to see in the red zone is Rishard Matthews. He showed in preseason last year the lower body strength to break tackles and out muscle people that few of our receivers have. I don't know what his arm length measurements are but he seems to have long ones for his size. That's big in the red zone. Anyway, physical players and physically talented players are the ones that score touchdowns, imo. And we sort of lack both, especially at WR.