I liked Uma’s Maid Marion and Rickman as the Sheriff.
I can see Rickman playing Robin as a harrassed executive, with Jack Black as an overly imaginative bard who comes up with the laughing and swaggering schtick.
If you want a really off the wall version, try ‘Robin And Marion’ with Sean Connery and Audrey Hepburn. I particularly enjoyed Connery and Robert Shaw having a rematch after their ‘From Russia With Love’ fight.