Hopefully just joking here. 
Actually I'm not, I figured the Clean and Press might be disqualified as two exercises, but it's not, so I'll go with that. It's the most complete exercise one can do.
That being said, I'd take a Muscle Up or the process of learning the exercise over the dip. Even if you fail, you're at least get a half-assed pull up or dip during the exercise. And as you get better with them you can play with isometrics, speed, and body position to get more out of them.
Also I'd take a pull or chin over a dip any day. Much rather have a strong back over pecs or tris for actual performance. You pull or pick up many more things than push them, and for real pushing comes from the legs anyway.