Replying to Need a lenses overhaul for my GH4

I have a tendency to write much more than necessary, so I'll keep this short:

-Been a GH4 owner basically since the camera was new
-I primarily do video (all types), but I'm starting to get into photography as well
-I primarily use a Sigma 18-35 with a metabones speedbooster, then some other not-so-terrific lenses with a cheap adapter.

I'm looking to put some decent money into new lenses that are all the same mount (modern four thirds), and get rid of the speedbooster as well.

So here's the question - what to get? I like the idea of going mostly with primes (maybe Rokinon), and maybe a zoom or two.

Also would love to try some anamorphic stuff, so if anyone has suggestions for that, that would be awesome.

Thanks!