Thing is about Wrynose (that's the one furthest west?) is that you drive over the top and suddenly the Isle of Man is staring at you!! Amazing drive down that western side.
Wrynose is the eastern one (fairly straight but with a steep drop off), Hard Knott is the steeper western one with multiple zig-zags.
I've been over a few times and found both quite scary, at least in an automatic which seemed to cope less well than manual.
Not done much driving in the Alps but have done the Loibl Pass from Austria to (then) Yugoslavia, which now has a tunnel under the summit.
By rail there's the Semmering Pass line (base tunnel opens 2026), the original Gotthard (still open for local traffic), and of course the superb Bernina.
The Tende tunnel under the Alpes Maritimes is part of a fascinating route between France and Italy (Nice-Cuneo).
Overseas, two superb mountain road routes are Milford Road in NZ South Island (Te Anau-Milford Sound) which has a summit tunnel (Homer) under the Darren range.
Mind-blowing scenery with unfeasibly steep mountains, deep lakes and fiords (Fiordland National Park).
The other one would be the Going to the Sun Road in Glacier National Park, Montana, over the continental divide.
More unbelievable glacier-carved scenery with many lakes.
The road was built to a Swiss design, and the park itself was originally developed by the Great Northern Railway for added rail interest.
Amtrak's Empire Builder still calls at East and West Glacier stations today, between Chicago and Seattle, and the GN's spectacular timber lodges are still operational.
Both areas have wonderful hiking trails.