I think some are definitely usable! Eddard and
Sandor are a big GPs of mine as is Tyrion. I would genuinely use
Bran as it's a name in my family tree but I also love the character.(although in the books/series the characters full name is
Brandon which I don't like)
One's from you list I like are:
Eddard
BranRickon
Tyrion
Theon
SandorSamwell
JoryArya (Although I've always pronounced it AH-yuh in my head not like
Aria)
Sansa
It's hard to separate the names from the character really, going through your list I was like "Hmm that could be a nice name but eugh I'm not going to name my kid after
Janos Slynt!" (same with Tywin and Cersei.)
Others:
Rickard
Balon
Davos
DrogoRhaegar
Loras
Petyr
AeronViserys
GregorYoren
Melisandre
Margaery
Doreah
Irri
I've tried to list ones that have been introduced in the TV show but there are so many great names in the entire series.