I know Yiannis Kouros, Wolfgang Schwerk, Dusan Mravlje. Dave Proctor isn’t in their class.
What do you know about Dave then?
Seems like since this is his first real long multi-day event you're doubting his credentials. He does have the Canadian 24hr, 48 and 72hr records so it's not like he's a nobody in the ultra world.
If he continues to do well and breaks the 72 days, is he still not in their class?