Sitka Spruce, Chundoo/Lodgepole Pine, Hexpine and Douglas Fir all shoot very nicely. I would probably give the nod to fir. It recovers very quickly and tends to be tougher and heavier than cedar. It can be kinda brittle, tho, so check it carefully if you smack something.
I taper all my shafts and even way back when guys split and planed their shafts by hand, most target and flight arrows were tapered. It must have been worth it then and I think it is worth it now. Tapering helps move the CG forward and lightens the nock end helping the arrow to recover from paradox quicker. I also wonder if it kinda "tillers" the arrow so that it flexes more evenly during paradox. I hope to experiment with full length tapering soon.
I like and often hunt with hardwood arrows, but I don't feel they shoot as nice a a good fir or POC.