What are the most versatile/customizable classes in general?

[spikeof2010]

I'm looking for a class that has a lot of possibility without spreading its powers too out, or at least the option to take multiple paths so that almost no two members of the class are the same, like the Ozodrin or Evolutionist or Gramarie, Trisocciate also falls into customizable.

[Time Blossom]

Pathfinder classes in general have a lot of options, between Archetypes and Archetype Packages and whatnot. You can be a Paladin who uses witch hexes instead of spells, a warrior-poet Bard with a ki pool and wushu weapon, a shapeshifting half-orc summoner who eats enemies to gain their power... it's pretty impressive. There aren't near as many classes as with 3.5, but I think it's safe to say that each class offers many more options for tweaking.

Plenty of those options are third-party, mind, but... considering every single thing you listed up there is homebrew I assume that's not a problem.

[Eldan]

Spellcasters. All those who don't have every spell of their list available all the time, anyway. So, wizards, bards and sorcerers, in core. Spells are their class features and they choose a handful of them from an incredibly vast list.

[JeminiZero]

There is also Generic Class 2.0 by Baron Corm and Build your own Outsider by Xefas.

[Bhu]

I've tried to make my Cat Burglar fairly versatile.

And of course there's always Factotum.