Jake Shimabukuro is an amazing performer to listen to. https://jakeshimabukuro.com/
Israel (Iz) Kamakawiwoʻole has been honoured with this Google Doodle video. His version of Over the Rainbow is so uplifting, it’s no surprise that some people call Israel the “Voice of Hawai’i” https://www.youtube.com/watch?v=fMSezPwq2js
I also recommend watching some of Cynthia Lin’s ukulele tutorial videos, as well as her friend Ukulenny (Lendl San Jose). Both Ukulenny and Cynthia Lin are passionate promoters of the ukulele!
Also, I can’t forget to mention Aldrine Guerrero and his Ukulele Underground online community.