Apostrophe when using a noun to describe plural form of that noun?

I want to say something like:

You can almost empathize with the Robert Moses' of the world.

Where Robert Moses' is being used to describe Robert Moses and other people like himself. Is the apostrophe needed? It's not really ownership, so should it be Moseses? That doesn't sound right either..

What would be the correct way to write this?

Another example without ending in es: walker's of the world or walkers of the world? Would this be different than the Moses example?

While apostrophes are used to describe plural forms, this usage is limited to abbreviations, letters and words to avoid confusion.

In other contexts, es would be more straightforward.