DMG Essence rules them all imo.

 

I have a few. Waves, FabFilter, DMG, iZotope, SPL and another one, two or three I can't recall off the top of my head. Regardless, if I am to choose one it's FabFilter. Hands down. I use it on whatever I need to and it sounds great.

If ever you're looking for a high frequency limiter (opposed to a high frequency compressor/suppressor/de-esser,) turn to "Tokyo Dawn Labs - Limiter 6 GE." Get the Demo. Use it on whatever you need, then bounce the audio file (demo versions won't copy/paste/recall.)