Examples of websites using
Avenir
(Avenir is a sans-serif font designed by Adrian Frutiger and Nadine Chahine, released by Linotype in 1988. It features clean and modern letterforms and is available in multiple weights and styles)
with
Neue Haas Grotesk
(Neue Haas Grotesk is a sans-serif font designed by Max Miedinger and Christian Schwartz and released by Linotype in 1957. The font family includes multiple styles)