The current concealers I use are MAC Studio Finish Concealer, MAC Studio Sculpt Concealer and Ben Nye Concealers. All three concealers are cream based in pot form. I always opt for these types of concealers because they tend to provide the fullest coverage. The only problem I have with these types of concealers is, they sometimes tend to cake.
After looking up reviews on makeupalley.com for a liquid concealer, I stumbled across Lancome Effacernes. It is one of the highest rated concealers with a rating of 4.1/5 based on over 300 reviews, with a repurchase rate of 76%. The rating is about the same for the much higher end Cle de Peau Concealer, which has a 4.2 rating with a 76% repurchase rate.
Lancome Effacernes Concealer is promised to provide a complete, natural-looking coverage, even out the skin tone, covers dark circles and minimize fine lines around the eyes. The result is a soft, matte finish that is long-wearing and waterproof.
There are 12 shades in total: Ivoire, Porcelaine I, Light Buff, Light Bisque, Clair II, Camee, Medium Buff, Beige (Neutral) III, Medium Bisque, Dore, Bronze IV and Suede.
I originally tested out the shade Beige III Neutral, but it gave my under-eyes a gray cast. So I ended up going with Light Bisque.