IIRC, Buddhists are technically atheists, as they have no godhead. They, of course, have their own creation stories, so technically a backwoods Buddhist would be an atheist creationist.
Of course, since you only believe the Biblical creation story (all those others are just myths, doncha know), and as by definition there is no such thing as a Christian atheist, there could never be an atheist creationist in your universe.
A buddhist atheist? hahaha. Well, this would certainly be a strange creature...buddhists are reincarnationists - and this concept requires "life after death" - a concept that orthodox (may I use that word, hehe) atheists reject outright in my experience. I have spoken and debated many atheists and almost all of them are contemptuous of ANY religion - but ESPECIALLY Christianity.