What concealer would you reccomend?

I want to try a new concealer because I'm using rimmel at the moment and I find its too waxy and it looks obvious that im wearing it if you know what I mean. Do you recommend me to use a liquid concealer instead? And which brand? I have combination skin if that helps. I'd like something with a good coverage because I like to use a sheer foundation/tinted moisturiser and that's not enough to hide my dark circles and occasionally I get spots too. Thanks in advance :) x