Will Ferrell was in Anchorman and Stepbrothers, which are awesome. He was also in Old School, which is the most overrated comedy ever. He was funny on SNL, but also was real unfunny near the end.
Other good Will Ferrell movies:
The Other Guys
Talledega Nights
Elf
Other bad Will Ferrell movies:
Land of the Lost
Semi-Pro
Blades of Glory
Bewitched
He was also good in "Everything Must Go" but it's not really a comedy, and it's kinda hard to take him in something that isn't funny.
Other good Will Ferrell movies:
The Other Guys
Talledega Nights
Elf
Other bad Will Ferrell movies:
Land of the Lost
Semi-Pro
Blades of Glory
Bewitched
He was also good in "Everything Must Go" but it's not really a comedy, and it's kinda hard to take him in something that isn't funny.