Personally, i like Adam Sandler. I think his movies are funny and fun to watch however childish they are. I agree that they are getting less and less funny as he goes but Im a big fan of Billy Madison, Happy Gilmore, and Big Daddy.
As for the intellectual comedy thing, some may yell at me for this but watch the Simpsonsa and though a lot of the comedy (especually in the new episodes) are kinda of crude on childish, they have several jokes that id consider intellectual. Ones that probably 60% of the viewers dont even pick up on. Those writers are bery very smart.