Examples of websites using
Neue Haas Unica
('Neue Haas Unica' is a Sans Serif font designed by Toshi Omagari and released by Linotype in 2014. This font family consists of multiple styles, including regular, light, bold, and italic variants)
with
Cooper BT
(Cooper BT is a serif font designed by Oswald Bruce Cooper and released by Bitstream in 1920. The family includes a variety of weights and styles)