2004 Infiniti G35 Car is misfiring, computer is not throwin

Hello,

I recently noticed my car was misfiring every once in a while. I removed the plugs, found a bad plug and replaced all of them. While changing the plugs I noticed oil in #5. I had the dealership change the valve cover. The car was still misfiring so I replaced the ignition coil on #5. It's still misfiring and I had a compression check done and everything looks good there. It's getting a lot worse now and I'm not sure what to do now...