The Cabal create roles then fill them with actors. They make sure that the lead actor has a distinguishing feature that the normies will lock onto. Hitler = hairstyle + tash; Hilldawg = hairstyle; RBG = hair + glasses.
There is only a limited set of genetic material to go around. A lot of peeps look similar. Using twins or brothers is ideal.
By designating a role to key players and scripting that role off camera, they can keep the role alive for as long as it's needed. Killing the lead actor won't work, because there is always an understudy ready to step-in.