How to banish the ugly townies off of The Sims franchise for all eternity + More customization

When I play vanilla I go into manage households and delete townies replacing them with my own or gallery sims. Otherwise I use Mccc to use my own sims randomly. It is exciting to see who turns up and in what family combination. That said I only set it to 75% my own sims. I love getting new fashion combinations and sim body looks very different from my own for diversity. At least 5 of my favourite sims were just random game generated townies.I even treasure some of their more eccentric looks because it makes them who they are.