Font
Lato : https://www.fontsquirrel.com/fonts/lato
Open Sans : https://www.fontsquirrel.com/fonts/open-sans

try our diagram/ chart template for powerpoint to combine it: 
https://elements.envato.com/user/SlideFactory

More Keynote Template:
https://graphicriver.net/item/keynote-template-professional-pack/19221872
