#2 Randy Orton
Despite the fact that Randy Orton is currently scheduled to compete in the 2019 SmackDown Elimination Chamber match for the WWE Championship, it seems highly unlikely that The Viper will win the title as we are in early stages of Daniel Bryan's title reign.
But this doesn't change the fact that Orton is rumoured for a Wrestlemania match with AJ Styles, which is why Orton could potentially defeat Truth for the US Championship in the future.
The feud between Styles and Orton doesn't necessarily need a title, but as we are heading into Wrestlemania season, it will give the duo something to fight for if they are facing each other at The Grandest Stage of them All.
It will also boost the prestige of the US Championship by having two of Smackdown's biggest stars face each other with the title on the line. We have seen Orton also hold the title before, as he has been a good option to slide into the mid-card and main event whenever he has been needed to without his aura being damaged.