Update – October 23, 2023: The Hornets waived Edmond Sumner, incurring a $40,459 dead cap hit. They also signed Ish Smith.
Another typeface that looks quite similar to Proxima Nova is Gotham, which is a premium font as well. Both of them appear almost the same, however, people on the web use the former the most. Here are some more typefaces other than Google fonts that appear to be the closest alternatives to PN.