I like "Young Folks", by Peter Bjorn and John. It was always played in the disco-pub I used to go:
Another Swedish catchy song is "I Follow Rivers", by Lykke Li:
I'm a fan of ABBA and Entombed.
That's about it, I'm afraid. Two bands are not many, but I'm not a fan of any Danish bands, so ”Well done, Sweden!”
Swedes have a knack for making good music. It helps that they seem to almost naturally pronounce English quite well.
Therion, Avicii, Tiamat come to mind.