Who is the heir apparent?

As a huge fan of humor and satire - I of course gobbled up anything Pratchett I could find. But with Sir Terry no longer with us - are there any other authors who come close to his genius?

I enjoy Gaimen and certainly Douglas Adams on the sci-fi side ... But haven't found anyone yet to fill the Disc world niche for me.

(edit: didn't realize it was proper to refer to knight by their first name)