well, for me and most people i've worked with, powder foundation works best for oily skin, especially cause liquid foundation will not "stick" to your skin as powder would.
to be quite honest i have yet to try a good matte finish liquid foundation, the liquid ones just leaves me showing pores and it dries quickly so you can't really blend well.
so I dont know if you want to try using a lightweight oil free mattifying moisturizer, then use a powder foundation.
Studio fix from MAC is good for oily skin, but its not so good for pictures, unless you're pale, because there's an ingredient in it which basically causes your skin to look white in pics when the flash hits. but if you're planning on everyday wear, studio fix is fine, its what i wear. As for coverage, its buildable, you can use a brush for light application, or a sponge for heavier application. I love sponge under the eyes although it might dry you out eventually, but the look is so fierce cause its all smooth and paled out
powder foundation, just like liquid, they all need pressed powder to seal the foundation, just cause its powder it doesn't mean you have to skip the setting step, because powder foundation will "melt" into your skin a few minutes after being applied.
pressed powder is not the same as blot powder too. blot powder you should carry with you for touch ups, because it doesn't build up and it will just mattify your skin. pressed powder will build up like loose powder and it will just make you look ghostly eventually.
as for the primers, prep + prime is awful on me as well, that's why i swear for fix + cause its a mist that you can either apply before makeup or after or both, to seal it all up. its great and it hasn't clogged my pores to this day, and its been like two years i've been using it.
your concern about that cheekbone/jawline area is is that the makeup dissapears in there or you need more coverage?
in that case, try this at home for awhile and see how your skin acts to this, but i sometimes use liquid foundation as my "primer" and seal it with powder foundation, that's for emergency pick ups when i either havent shaved and need to conceal the beard or i got a breakout... basically its double layering, and it can work best with just using powder. liquid on liquid is gonna be a mess girl