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
Signifier
(Signifier is a serif font designed by Kris Sowersby and released by Klim Type Foundry. It is a complete overhaul of the original Signifier family, featuring improvements in weight distribution and curve quality. This font family is available in a range of weights and styles, including normal, narrow, condensed, and compressed widths)