might be wrong, but i don't think sully's had 4. and that 18 i knew for sure, included geoffrions. kariya might have had 2, but i'm not sure which would make 19, only remember one for sure, the last game of the 06 season.
radulov didn't have one did he? i know ronning never did. and don't think we've ever had a defenseman hattrick.
It's pretty neat how we can do this. If we ever get all 20 of them for sure we should keep track of it somewhere for future fans. I'd imagine teams like Montreal have a difficult time keeping up with things like "hat tricks in team history"