#4 Andrade

Ever since he arrived on the main roster, fans have been clamouring to push one of the former top NXT superstars. Last month he was involved in a hot feud with Rey Mysterio which truly showcased his in-ring skills with tremendous back-and-forth action.
This past Sunday, he missed the Elimination Chamber pay-per-view where he could have taken an injured Mustafa Ali's spot in the WWE Championship Elimination Chamber match. But instead, it was given to Kofi Kingston whose performance was also incredible.
This past week on SmackDown he lost against the new NXT debutant, Aleister Black. WWE has to seriously consider giving a big push to Andrade and it won't happen if he continuously losses matches and misses pay-per-views.
It is rumoured that he will face Mysterio in a Hair vs. Mask Match at WrestleMania 35. This will, of course, be another thrilling contest between the duo or WWE can possibly give Andrade his first main roster championship at the event.
#3 Bobby Roode

Another main event star of NXT turned out to have a lacklustre main roster run was Bobby Roode, his run was also similar to Andrade' s main roster run. When he joined SmackDown in the beginning, he missed a lot of episodes as well as pay-per-views.
Although he became United States Champion, his run with the title was underwhelming. Then he was moved to Raw during Superstar Shake-Up which was surprising and it seemed WWE could be preparing to push Roode.
But nothing happened again, he wasn't involved in any major feud and neither in any championship match. Later on, he began to team up with Chad Gable and won the Raw Tag Team Championships by beating AOP.
They lost their titles to The Revival two weeks ago on Raw, and now is the right moment for Roode to turn heel on Gable, move into the main event picture where he was expected to be after his NXT run. Because the main problem for Roode has been that he is a natural heel but until now he has been working as a face instead.
So, a heel turn will bring Roode's big momentum back which will help him to be in a major match for this year's WrestleMania. One option that would be great is facing Finn Balor for the Intercontinental Championship as not only the match would be exciting to watch but also it would begin Roode's big push in the main roster.