I haven't seen all of these, so on some I can't comment. Sleeper I saw and dismissed as another example of Allens' self-indulgence - the man annoys me intensely. I mean slap-in-the-face-with-a-wet-kipper annoyance.

Peter Sellers is a legend, of course, and the films of his you chose show why.

Purely personal, but I prefer The Ruling Class to Kind Hearts and Coronets as a satire on the British upper classes.

Again, as far as Steve Martin goes, I prefer Roxanne.

My own favourites? Really depends on mood.

I know we're not supposed to like the Carry on...films these days, but I do like Carry on Up the Khyber. Yes I know, blackface and racial stereotyping and all. But if you really listen, the race that take all the stick are the English! From Sid James as the wily Sir Sidney Ruff-Diamond and Joan Sims as a repressed and passionate Memsahib to chinless wonder Captain Keene (Roy Castle) and sadistic Sergeant-Major MacNutt (Terry Scott ,who has one of the best-ever Sgt-Major lines "Steady, lads! The only thing you've got to worry about is me. And I'm right behind you!") Every aspect of the English character - stiff upper lip, imperial arrogance, obsession with 'tiffin' and abuse of the working classes - comes in for a sideswipe. On the other hand, Kenneth Williams, on fine snarky form as the Khasi of Kalabar, and Bernard Bresslaw as the fierce Burpa warlord Bungdit Din, are shown in a more than ordinarily sympathetic light. This is less smutty than many of those films, and the better for it.

Galaxy Quest is immense fun. Especially for a dedicated Whovian who regards the Star Trek franchise as incredibly overrated!

So is the criminally underrated Down Periscope!, in which Kelsey Grammer leads a crew of misfits on an exercise, challenging the might of Americas' nuclear navy in a WW2 diesel submarine.

As to comedy in the 21st Century, there seems to be a trend for building comedic elements into films that are primarily in another genre. The Expendables and its sequels being a case in point, along with Red. There are also strong comedic elements built into many of the MCU films, especially the Ant-Man arc, Guardians of the Galaxy and Deadpool. It seems that comedy is deemed no longer able to stand on its own.