@farmerman,
I find all these guys who are supposed to be funny, Jack Black, Ben Stiller, Will Ferrell & like you said even Steve Corell are just going through the motions. Look at the rubbish they've churned out, two laughs per movie if you're lucky.
Yet funny enough it's the so called serious actors who are good for a laugh these days, George Clooney, Bruce Willis, John Malkovich. Two of the most amusing movies I've seen lately have had Clooney in them , "The men who stare at goats" with Clooney & Jeff Bridges, Funny. And "Burn after reading", I really enjoyed that, Clooney, Malkovich & even Brad Pitt was good in it.