I'm Swedish, and I grew up reading - and still read! - a bunch of European comics! :3 Blacksad is amazing.
Asterix, Tintin, Lucky Luke, Iznogoud, The Smurfs, Johan et Pirlouit, Yakari, Buddy Longway, etc., etc., were all cornerstones of my childhood, and I've still got a big bunch of them on my shelf! And like @Chopythes says, right now, Enrique Fernandez is being published in Swedish, for which I am infinitely grateful - his comics are beautiful and amazing. <3
In general, I've found franco-belgian comics to be very, very beautiful (Derib's work on Yakari and his Western comics <3 And Moebius!), but the stories themselves don't always hold up well. I remember reading Le Sceptre d'Ottokar, the Tintin album, and just being so annoyed at the way Tintin would just speak his every thought out loud. There's this one scene, where he's sitting TWO FEET away from someone he suspects is a bad guy, and talks OUT LOUD about how that guy IS a bad guy - and the bad guy doesn't hear him. There's also a tendency in a lot of Tintin comics of just telling/explaining the entire story in dialogue, as if the readers can't see the pictures of what is happening.
There are also a lot of Swedish comics, of course - ranging from newspaper comic strips to autobiographical stuff (which is kind of our thing, I guess?) and even a bunch of all-ages adventure comics! Meet Bamse, the world's strongest (and kindest!) bear! Super-popular with kids, and there's a bunch of animated movies and at least one small theme-park based on him and his adventures:
Also, horse-comics. I don't know if this is a big thing in other countries, but Sweden has/had at least two separate magazines full of horse-comics when I was growing up, and at least one of them is still kicking around. You think I'm joking? I'm really not:
Horse comics - I've read a metric ton of them, and used to dream of being able to draw horses like Lena Furberg, horse-comic-artist extraordinaire.
Sweden has also more or less taken over the originally American pulp-character The Phantom; it's been published in Sweden since 1940, and currently, The Phantom-comics produced in Sweden by a Swedish team are some of the most popular monthly comics on the market.
We've even got a The Phantom-club! I've met them a bunch of times at cons - their chairman has the best moustache, and is also super-nice and friendly. :3