#4 Angel Garza
Another unlikely possibility, but not an impossible one. Angel Garza debuted on RAW as Zelina Vega's client after Andrade's suspension and has been impressing the crowd since then. Garza's gimmick is one that will have the same impact on the fans as a face, as it is currently having as a heel.
A few losses for the team can lead to tensions between Andrade and Garza, with Vega and Andrade kicking Garza out of their group. Garza can then come back for revenge, and after a grueling feud with the former NXT Champion, Garza will come out as the new United States champion. Not only does this free Andrade for the main event scene but also gives us a credible mid-carder in his place.
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His relationship with Humberto Carrillo can work into a storyline as well, with Carrillo having his brother's back against Andrade. The brothers may even tag a few times, and when Garza gets his crowning moment, Carrillo snaps on him, turning heel. A major character change may finally allow Carrillo to find his footing on RAW.
A win-win situation for all involved.