Shopify comes with a free selection of Google fonts and licensed fonts from Monotype.If you haven't browsed through the library please do, you will find hidden gems in there.
This is my list:
Avenir
Designed by Adrian Frutiger its a beautiful sans serif typeface. A perfect pair with ITC New Veljovic.
Futura
Sans-serif geometric typeface designed by Paul Renner. Highly readable even at small sizes. It goes well with Playfair Display, Proxima Nova, Helvetica, or Open Sans.
Linotype Didot
Designed by Adrian Frutiger, Linotype Didot is the elegant choice for luxury or fashion brands. A classic touch. Best used for large display text, not very readable for smaller text.
Century Gothic
Designed by Sol Hess. Geometric clear clean design. Great for headlines and display. Goes well with Frutiger or ITC Berkeley Old Style.
Rockwell
Designed by Frank Pierpont. Amazing for branding, headlines and display with a bit of handmade charm. Perfect pairing with ITC Franklin Gothic or Frutiger® Serif.