I have this problem too.
I have clinique redness solutions yellow powder which I use sometimes but its not enough, and I have to be careful applying it or it looks wrong. and i've been looking for a foundation too.
Bare minerals have been mentioned in this thread, I don't want anyone wasting money, if you have sensitive skin and are going to buy bare minerals make sure you consider the MATTE version as its less likely to irritate.
I have tried the bare minerals powder mineral foundation, the original one, and although it looks nice on my skin, it makes my skin tingle & itch especially if I sweat at all. Since we've had hot weather my skins even worse and itchier when I use it.
I looked into it and it has something in it called bismuth, which can irritate people with sensitive skins. So if you have rosacea/sensitive skin i'd steer clear of the original version at least test it first. Matte doesnt have bismuth in apparently.
I do like the way the original powder looks once on but it leaves my skin feeling and once i've taken it off, looking a bit irritated.
I am going to buy it in matte unless I find a better option.
I hope this helps someone.