I've said this several times before, but I would actually be surprised if Jack Hughes was the only player from this year's US-NTDP selected by the Devils in the 2019 draft.
Though many Devils' fans pipe-dream of somehow acquiring Cole Caufield or Matthew Boldy is about as likely as coming home to find bigfoot on your front porch eating Fruity Pebbles, the Devils have 6 more picks between #34 & #96 and this US-NTDP is just loaded with NHL prospects.
Though there are some US-NTDP forwards who could interest the Devils in the later rounds, most notably John Beecher (if he falls to #34) and Judd Caulfield (could fall into the third round), most of the development team's major forwards will be gone by the first 15 picks (Turcotte, Zegras, Caufield, Boldy). If RW Patrick Moynihan or LW Michael Gildon were to fall into the late rounds, they would have to be considered possibilities for the Devils, as well.
Still, the most likely scenario is that the Devils draft a US-NTDP defenseman, as D remains the largest organizational need and most of the US blueliners (all but Cam York) have a chance to last past the first round.
My personal preference (which I don't shut up about) is Case McCarthy -- a incredibly strong and physical, shutdown RD who also skates quite well and makes smart decisions with the puck. Henry Thrun is certainly also a possibility, as is Drew Helleson. Both Thrun and Helleson fly a bit under the radar on their talented squad, but both have very high floors as productive and mobile bottom-4 defensemen.
Marshall Warren and Alex Vlasic are two US-NTDP defensemen who have higher draft stock than Thrun/Helleson/McCarthy for myriad reasons -- it would likely take the #34 pick to land one of those two. As Warren is an undersized LD (though he is excellent), I'm not sure I would use that pick on him, considering the Devils already have Will Butcher, Jeremy Davies and Ty Smith fitting that description. Vlasic offers the size that the Devils blueline needs, but his game needs more work in my opinion than some of the other US-NTDP blueliners.
Of course we should mention Bobby Brink. Though not a "member" of the US-NTDP team, he joined them for the U18 in Sweden and is a RW with extreme offensive upside. He's a strong bet to go in the late first round, but if he slipped through to #34 I'm certain the Devils scouting team would be over the moon with the opportunity to draft him with an eye on pairing him with Hughes in the future. If both Brink and Beecher were available at #34? Man, that would be some conundrum.
Ultimately, my big later-round US-NTDP target remains Case McCarthy. He should remain available with the Devils later 2nd round picks (currently #55 & #60), and he checks every box of what the Devils scouts look for (skates well, high character, high hockey IQ) while checking off a bunch of boxes of what they sorely need (RD, strong, physical, shut-down, perfect to pair with an offensive LD).