Does anyone please know which actor wants these Grand Staffs of Charming? I have three of them and they each weigh 8 pounds. They can't be dropped because they are quest items. Checked the wiki... nothing.

In addition to these I have:

Dravin's Bow - 7 weight
Calipers - 0.5 weight each
Halldir's Staff ( wasn't Halldir an elven captain in LotR? ) - 8 weight
Hjalti's Sword - 12 weight

Finn's Lute - 4 weight ( quest completed )
Pantene's Flute - 2 weight ( quest completed )
Rjorn's Drum - 4 weight ( quest completed )

Unusual Gem - 0.5 weight each

All quest objects for people I have never seen in my life ( with the exception of the instruments ). Help?

Heee... I don't know, but I will move this to Spoilers. I have to think that is a shout out to the Community Manager.

The Charming Gstaff can be left to sulk in a weapon rack, if you want to get rid of him. Err, it.
Some bards at the bards college are searching for those instruments, but you will most likely need to use console commands to start the quests, and to get rid of the instruments afterwards. No luck if you're a xbox/ps3 user.
Certain members of the Thieves Guild can tell you more about the Unusual Gem, but they only talk to members.

i'm on thexbox, i was stuck with 2 of em for a bit but i fixed it, what you do is, first off, put em on weapons racks in a house, once you do that, then go talk to the mages at the guild, fendhal i think and olmund or whatever his name is, then go back to the weapons rack and grab the staffs and that should activate the rest of the quest and go back to talk to fendhal and he'll take the staff from you. its a bit tricky cause until i put the weapons on the rack and then went and talked to fendhal again the quest wasn't letting me give him the staff but i put em on the rack then went back to talk to him then went and got them off the rack so thats what worked for me.

how do you put them on a weapons rack (im on the 360) i cant seem to activate the rack ??

Dravin's bow can be given to him on the farm right outside of riften. And btw, they say the take up inventory weight, but in fact they are weightless.

you should be able to point your crosshair on the rack somewhere to activate it, its got to be a house you own i think, just walk up to the rack. it will unload em.

ahhh, the house i got doesnt have one, i dont think, will go and check

EDIT well ive got one in my house and too no surprise i cant activate it, i can do the book case next to it but not the weapon rack, ive sat there pressing A all over it and nothing happens,

another bug to add to the growing list............perhaps i should become a beta tester !!

I suspect your talking about the Breezehome house in Whiterun here - I have the same problem (a non-working weapons rack!).
I solved this by purchasing the house in Winterhold (Ulfric's city) for 12,000GP, there is a nice big weapons rack in that house and 3 mannequinns (one of which is now wearing the Emperor's clothes - that I took off his still warm corpse!).
Enjoy!