Subtle is key to a good compressor IMO.
I've had the same comp pedal on my board for the past 8 years. It's a Mooer Yellow Comp. A clone of the Diamond Compressor (hence the yellow). The Yellow Comp is perfect for me. It just adds a little lift to the tone that you almost don't hear, until you turn it off!
Then it's like WOW! It really is doing something!
Before the Mooer, I tried two different MXR comps that are supposed to be the shizzle, and I disliked both. They were either too squishy or sounded great with dirt and crap clean, or great clean and crap with dirt. No way could I set and forget and impossible if switching back & forth clean/dirty.
I bought the Mooer for half the price of the MXR's and haven't looked for another compressor since.
I also found a demo of another Orange Squeezer Clone by the same dude in Greece that built my SOB Dual OD.
It is also subtle, sounds great to me. Has the just the right amount of "secret sauce".
If you check out his other videos, there's one there of the SOB too. Since you're an OD junkie, you should like it!
Adam A - Orange Squeezer
Ok, here's the SOB too!