#2 John Cena
In my list of greatest US Champions of all time, John Cena is at the top. The United States Championship was the first title that he won in WWE.
His last run as the US Champ started when he defeated Rusev for the title at WrestleMania 31. The months that followed saw Cena bring back the US Title Open Challenges, putting on great matches every week.
During this process, he introduced and put over a lot of new and upcoming stars like Kevin Owens, Sami Zayn, Neville etc.
In the last episode of SmackDown, Truth mentioned John Cena a couple of times during his promo, which made me think how interesting it would be to put the title again on Cena and let him do what he does best, bring the glory and mainstream attention to the title!
Due to his current busy schedule, I do realize that it might not be possible for him to come back for a long US title reign, but one can only hope!