Great stuff listed so far… Here’s a few more:
Ledward Kaapana is a legend of Slack key guitar, but this guy rocks a uke too https://www.youtube.com/shared?ci=9RG-hw1rdqg
Kalei Gamiao is amazing too… Here’s a video where he backs Singto Numchok, another great uker.
https://www.youtube.com/shared?ci=L3hiOCJKW0s
Tobias Elof is from Denmark and has a flavor to his playing that is quite different from a lot of the traditional ukers.
https://www.youtube.com/shared?ci=5_ks-zcXYro
Rob MacKillop is an accomplished classical guitarist, lutist, and probably several other instruments I’ve never even heard of, but he’s played the uke from childhood. You can see his enjoyment for the instrument when he plays.
https://www.youtube.com/shared?ci=j3p6QKLZ71c