norway reached canada, the swedes reachd persia (ingvar the far-travelled). the danes were good at conquering (england conquered twice if you don't count the danelaw, which norwegians also were a part of). the swedes did a bunch of conquering in eastern europe but were quickly assimilated by the natives.
rollo (either a norwegian or a dane, we're not really sure) conquered normandy and became the great great grandpa of william the conqueror. norway founded a bunch of towns in ireland and did some conquering around in scotland and northern england (also tried to invade england, but lost at the battle of stamford bridge. also, read up on Harald Hardrada, his life was epic). norwegians also crusaded a bit in the holy land when they converted.
norway and denmark also has owned each other, which is kinda funny. the varangian guard was also a thing many scandies were a part of.
honestly, hard to say. as a norwegian, i'll say denmark