I guess I’d say Wolf Hall, except imo that goes too far in the other direction (for almost everyone…that is, villainizing/stupidifying figures to ridiculous amount to make Cromwell look a) better and b) more intelligent, which is kind of unnecessary for the latter– his genius is pretty well-recognized, imo– and a bit of a reach for the former…he was ruthless when he felt he needed to be for self-preservation, which isn’t that much different from many powerful figures of the Tudor court). 

As for fics, none of my fav’s really even have more than a passing mention of him…he’s not in the character tags, for instance.