Instead of GOTHAM you can use...
Remember back in the day when we used Gotham for EVERY project?
Or am I dating myself?
Here are some great alternative quintessential simple sans that are incredibly stylistically flexible:
Instead of Gotham you can use...
Google Fonts / designed by Julieta Ulanovsky, Sol Matas, Juan Pablo del Peral, Jacques Le Bailly
Adobe Fonts / designed by Mark Simonson
Fonts Arena / designed by Chris Simpson
Pangram Pangram / designed by Mat Desjardins
Adobe Fonts / designed by Type O Tones
FF Mark Pro
My Fonts / designed by Hannes von Döhren, Christoph Koeberlin
My Fonts / designed by Radomir Tinkov
Great sites for free (commercial use) fonts
Google Fonts - fonts.google.com
Adobe Typekit - fonts.adobe.com
Font Squirrel - fontsquirrel.com
Other articles with free sans serif fonts
InscribeMag - 35+ Excellent Sans Serif Fonts (Free & Premium)
CreativeBloq - The best free fonts: 86 quality designs for creatives