There are many compressors on the market at the minute. Each manufacturer producing their own versions of classic ones as well as coming up with new ideas and tones. For me however there has only ever been one company that I would use for compression and that is Keeley.
I have had the Keeley on my board for many years now and have always used it, just as much as I use distortion and delay. All I will say is that compression is a very personal effect. What works for one player may not work for all, and it depends on the guitar, the amp and the other pedals in the chain.