There's some confusion here - you want a road style tire in gravel sizeway. That kind of "slick".
The Pathfinder Pro, G One whatevers, Power Adventure, Cava, etc - are all gravel tires. They aren't slicks and they don't ride like road tires.
AFAIK there are only two other competitors to the Sno. Pass right now - Panaracer did one or two runs of 700cx43 Gravel King Slicks before they revamped their entire line. They're still available but when they're gone they're gone. True road style slick tire (although actually file tread just like the Sno. Pass) and IIRC they were 375-390g.
Panaracer GravelKing Slick TLC 700c Tire - Width: 32mm, 35mm, 38mm, 43mm :: Available in Colors :: From $41.00 :: Panaracer 700c Cyclocross/Gravel Clincher Tires
www.universalcycles.com
The other is the Challenge Strada Bianca 700cx45 - but it's a relative porker at 550g -
https://www.challengetires.com/shop/products/strada-bianca-6/216296
Otherwise you're SOL. I'm waiting for Schwalbe and Continental to add more tires in and closer to these sizes. Schwalbe has the 700cx38 Pro One and Continental has the 700cx35 GP5K AS so fingers crossed we get 40+ models next year or year after.