SOM - I would be extremelly carefull about including holmegaard type of bows, since they are out of epoque entirelly. And that the bow we today call homegaard is actually 1 single neolithic find. (There is actually number of similary worked down neolithic bows like holmegaard, but none with the same degree of refinement or finish.) There are scandinavian bows which arent longbow stickbows, e.g. fenno ugrian two-wood laminates and some sinewed bows, but they do not bellong into the viking culture as such, even though have been used within viking sphere of influence. The Fin mercenary archers might have used them, but taking all things in consideration - why should they? Longbow of the time shoots about the same as these two wood bows, which are mass drivers, but poor in speed and think of all the moisture on ships.
If you want diversity in genuine viking longbows take a look at waterford bows, which vary in construction alot, some of them being rather similar to hedaby, some other quite different.
Jaro