Incredible that there are only two guys with 10+ centuries in that list. Shown how hard it is to bat for a long time when you're also keeping wicket.
Watling didn't quite get there (7 as keeper) but he is one of only 9 keepers to also score a double century.
Special mention to Brendon Kuruppu who scored a double opening the batting for Sri Lanka, carrying his bat, then keeping wicket for the remainder of the match in a high scoring draw (he never kept wicket in a test again - who could blame him?).