The huge Freak 4 Pro Bundle is currently on a $7.20 sale at the Daz Store. It requires M4, but most people have that character.
If you just want a big wrestler then I assume F4 has been rather overtaken by Freak 5 for Genesis 1, although I must say that F4’s set of realistic skin MATs do look very good. Freak 5, incidentally, has a good The Hulk (as ‘The Savage Freak‘), and an awesome Clan Bears Regenesis add-on (though with a huge amount of dependencies, including the LAMH plugin for the fur)…
But back to F4… Freak 4 doesn’t give you access to a lot of new characters, since he always had a bit of a niche fan-base. But he gives you access to a small number of quality Marvel superheroes made for F4, and does so natively within Poser. Such as a pretty good Captain America (as ‘First Avenger’); an early-1960s The Thing (as ‘Rock Man’, harking back to the time before Kirby firmed-up his stylized hexagon-skin; and a starter base for making a Swamp Thing (as ‘Primitive Beast’, though Marsh Monster has the better head and may be a better choice for Marvel fan-art). With the smart city suit in the Pro Bundle you could also easily make a Kingpin (the nemesis of Daredevil and Spiderman, I seem to remember). So far as I can tell there was no Hulk for F4.
There’s also a Doomsday for F4, a character I’d never heard of… but it seems he’s a DC Comics super-villain who battles Superman.
For one or more of the above you may think it’s worth $7 to get the Freak 4 bundle, so that you can load them up.
If you’re envious of the Clan Bears for F5 (above), then there’s also the free lion-like SOTO’s Vincent for The Freak 4 (a celebrity character, Ron Perlman in the series Beauty and the Beast).
To get The Freak 4 morphs working with his Micheal 4 base, after installing Freak 4 into your runtime you need to go to…
… and find the DzCreateExPFiles-M4.bat and M4Gens.bat files. These are batch script files which, when double-clicked on, will go find the new morphs and inject them into M4 so that he can handle being The Freak.