mafintosh and dmc are 2 of the main guys, they are both available in keet, mafintosh is in many rooms but mainly the community room (link on the profile page) and i have only seen dmc in  🍐 (invite expires on 2024/7/4 2:50 UTC) 

pear://keet/yrbixdcpsnumxkoswdt7qt8c4m4c3xyos8qjmz361gz19akhtoie9fge8ita5quumqkfpnh45dw5d8cbar5rs9iywy9t7x19ckhhjt8r99co5bug 

they do have a lot of interesting people around either working for holepunch or using pear, i would maybe suggest you get a bit familiar with it all before doing a talk