Two I have encountered in my life recently:
Office Park
Dressy Casual
Evil Moderator…
No, no, no. The evil moderator is a moron. Oxymoron is something else.
Help Centre
Traffic Calming
Here’s a few…
Jumbo shrimp…
Civil war…
When I was in high school we had a teacher who we always called the “oxymoron”. Her name was Miss Mann. 
soft rock
business ethics
In Australia, there is a seat in Federal parliament called Oxley. At one time the local member was known as the Oxley moron.
Fascinating new series of Big Brother…
decaf coffee
public servant
PBS
Pianoforte
Painless Medical Procedure 
Driveways and parkways.
http://www.oxymoronlist.com/ these are very funny, and very true.
Been looking into my family history, have we?
Theological
Meant with humility and respect - and only because so many of us have been there…
Military Intelligence
Byll
Cheesesteak Hoagie 
The main one that comes to mind:
common sense