#4 Daniel Vidot
If WWE was looking for someone similar to Roman Reigns, then they could definitely look the way of Daniel Vidot. The former National Rugby League player signed a developmental deal with WWE in 2018 but hasn't appeared regularly on TV. He's participated at live events and from the picture above, you can see how he could easily fit into a new incarnation of the popular group.
He had been going by the nickname the Samoan Ghost and how cool would that be to see in NXT and the WWE? He's athletic, hard-hitting and is a good looking chap just like another famous Samoan who was in the Shield.
Vidot could easily play the Reigns role in the manner that he's a relatively unknown commodity to casual audiences in the US. It could take time for the crowd to acclimate to him but he'd certainly have the visual appeal that Reigns did, except for the wet, long hair that the Big Dog sports. The group would need a blend of known commodities and unknowns and Vidot would fit the latter.