Martin has indicated that Dunk & Egg won’t be one: http://us.blastingnews.com/showbiz-tv/2017/06/what-to-expect-from-game-of-thrones-spinoff-series-001786897.html

I’m officially referring to this as Saladgate from now on, at the very least.

A Secretary of State may have had just a tad more experience in that area.

They maintain their mental faculties on iZombie so long as they feed on brains regularly.

Yeah, one actually uses a brick as a tool against glass early in the show’s run. Kirkman or someone else involved with the show indicated that they lose those abilities over time, and we see it less now that many of the zombies aren’t so fresh, though it’s never been explicitly explored in the show.