I'm sorry to see my favorite, Tchaikovsky, in last place (why do I seem to always support the underdog?).
"Dance of the Sugar Plum Fairies". I love that piece. I wrote a solo guitar arrangement for that back in the 70's. I was going to send it to my favorite guitar player, Ritchie Blackmore, but never got around to it. I stumbled across it the other day when I was cleaning out my closet.
I also love "In the Hall of the Mountain King".
And Finn, as far as Scandinavians go....well, my favorite Scandinavian of all time, and one of my top guitar heroes, is that incomparable genius himself........Yngvie Malmsteen.
Not all of the brilliant composers are dead guys.