[Bozos of Bones]

The Aasimar ranger/bard could be quote good, but I think you should know that a ranger isn't all that good at high levels. His best multi-class option is only one level, but that would incour an xp penalty for the aasimar. You might consider another race.
The fighter/druid could be nice. But ask yourself: why add one level of fighter to a druid?
Rogues are not very usefull in this game, all the rogue skills can easily be covered by the bard. You'd do well to take a barbarian x/fighter 4 with weapon spec in axes.