No particular reason for asking, and please don't post any comments about spoiler-y things GRRM or anyone else may or may not have mentioned in interviews about upcoming twists in upcoming books or seasons of the TV show. Purely in-universe, please.
And nothing from Winds of Winter preview chapters, too, please. Especially if they confirm someone I think is dead is actually alive, or vice versa... Answers purely based on in-universe knowledge from the books up to ADWD and the show up to season 5.
Off the top of my head, I can think of a few, for example:
Barristan Selmy is dead in the show but alive in the books
...and I know there are a few more, but I can't think who they are.
If someone's implied-dead in one and explicitly dead or alive in the other, that's worth mentioning with a caveat, for example:
Myrcella Lannister is shown to be dying in the show but is alive in books, but the show doesn't rule out the possibility of a last-moment antidote
...but let's leave out character non-appearances (including odd cases like Lady Stoneheart).
Let's also leave out people who are implied as being dead in both but whose deaths are equally unconfirmed in both, like:
Stannis and Jon Snow
Likewise let's leave out characters who are dead in both but died differently, like the Tickler.
Obviously, only characters who exist as named characters in both show and books.
On-topic note: questions asking for finite lists of things are on-topic and there are hundreds of examples on this site with great answers. It's never-ending lists with an unlimited number of possible examples that are off-topic here.