Was curious so took a look, and aside from Vegas and Seattle, New Jersey is the only team never to have been swept. For posterity I put the list of everyone's last sweep below:
Anaheim - 2018 (Sharks)
Arizona - 2011 (Red Wings)
Boston - 1993 (Sabres)
Buffalo - 1993 (Canadiens)
Calgary - 2017 (Ducks)
Carolina - 2019 (Bruins)
Chicago - 2017 (Predators)
Colorado - 2008 (Red Wings)
Columbus - 2009 (Red Wings)
Dallas - 2001 (Blues)
Detroit - 2003 (Ducks)
Edmonton - 2022 (Avalanche)
Florida - 2022 (Tampa)
Los Angeles - 2018 (Golden Knights)
Minnesota - 2015 (Blackhawks)
Montreal - 2009 (Bruins)
Nashville - 2022 (Avalanche)
New Jersey - Never been swept
Islanders - 2019 (Hurricanes)
Rangers - 2020 (Hurricanes; in the play-in); otherwise, 2006 (Devils)
Ottawa - 2008 (Penguins)
Philadelphia - 1997 (Red Wings)
Pittsburgh - 2019 (Islanders)
San Jose - 2010 (Blackhawks)
St. Louis - 2021 (Avalanche)
Seattle - Never been swept
Tampa - 2019 (Blue Jackets)
Toronto - 1981 (Islanders)
Vancouver - 2013 (Sharks)
Vegas - Never been swept
Winnipeg - 2021 (Canadiens)
Washington - 2011 (Lightning)
What makes this even more of an obscure stat is that Leafs are the only team whose latest sweep is from 1980's, only three team from the 1990's, and 15 (if I counted correctly) teams have been swept in the last 5-6 years.