Examples of websites using
Helvetica
(Helvetica is a sans serif font designed by Max Miedinger, Linotype Design Studio, and released by Linotype in 1957. It is available in a wide range of styles and weights)
with
Rubik
(Rubik is a sans-serif font designed by Hubert and Fischer, Meir Sadan, Cyreal. The family consists of multiple styles, including regular and italic versions, available in various weights)