I thought this was already a thread but I couldn't find it.
The characters mainly seem to be Alpha, which is unsurprising.
Richard- LII
Ehrlich- ESE? ILE? SLE? I feel like I've seen examples of all three of those types that match his personality. I lean Alpha for him though.
Big Head- Alpha introvert. Probably LII
Gilfoyle- ILI. Could be some subtype of LII I'm unfamiliar with.
Jared- EII
Dinesh- unsure. Goofy LIE or ILE maybe.
Monica- strikes me as LIE. Very businessy. EIE is possible too.
Peter Gregory- ILI
Gavin Belson- SLE or LSI, I think.