If we just count the actors getting parts since D&D destroyed the IP with season 8 (2019), I have only seen Alfie Allen, Jason Momoa, and Madson (Rob Stark) in one show each, which were SAS: Rogue Heroes, Dune, and 1917.
If we open it up to after they got big on GoT, around season 3 (2013), then Gwendolyn Christy gets added to the list and probably wins with the two Star Wars and one Hunger Games (not that they were very big parts).
Guess I will go look for The Bodyguard now though.
So this is all post GoT, and I wont include Jason Momoa or like Sean Bean they are in lots of shit. Momoa is fucking Aquaman, and was great in See, hell he was in DUNE!
Kit Harrington (Jon) Gave two middle fingers to everyone and went home to bang Rose Leslie. Living the dream, though is slowly getting back into acting. I hope they give him a show I liked him, not his fault the writing was shit
Peter Dinklage (Tyrion) seems to only do voice work to pay the bills or serious drama roles now. Was nominated for an Emmy for Cyrano, and was very very good in "I Care A Lot"
Nikolaj Coster-Waldau (Jamie) man they keep tryin with him. He was bit part man for Ridley Scott for years and seems to be slippin back that way, just never quite worked out for him
Lena Heady (Cersei) took a break after GoT, but just was in White House Plumbers and was great in it
Emilia Clarke (Danny) sucks at acting and I do not like her. She still gets roles though, I saw her in a film festival movie called the Pod Generation and I hated it, also Secret Invasion
Sofia Turner (Sansa) had two kids after GoT ended, was in a series called The Staircase which I have been meaning to watch cause I like Toni Collette, and is getting another main role in something else coming out soon
Masie Williams (Arya) is also blah, is supposed to be Catharine Dior in a new AppleTV show coming out IDK how that will be
Liam Cunningham (Davos) was just in that Dracula film and was pretty good in it even if i didnt care for the film. Has a part in the Netflix Three Body Problem so that will be his next big thing
Nathalie Emmanuel (Missandei) Went right back to being in Fast and Furious films and is lead on some show on Quibi with Kevin Heart and Jon Travolta
Alfie ALlen (Theon) was great in Jojo Rabbit, and now does British shows we rarely get
John Bradley (Sam) was in Moonfall which was sadly bad, but will be in Three Body Problem as well
Issac Hempstead Wright (Bran) went back to school and studying to be neurologist
Gwendoline Christie (Brienne) Sandman, Wednesday, Severance season 2, Star Wars films. Seems to be doing quite well, fills the niche that Tilda Swinton had when she was younger though Tilda is a much better actor