Random Riddle: Half A Dozen Down

I am Happy from Snow White and the Seven Dwarfs.

With my mates I toil day by day (I’m a miner)
But never do I complain (I’m not Grumpy)

I speak up if I have words to say (I’m not Bashful)
and have an agile brain (I’m not Dopey)

I rarely sniffle or blow my nose (I’m not Sneezy)
A medical man I am not (I’m not Doc)

I do not yawn or try to doze (I’m not Sleepy)
Can you name me with the info you’ve got? (Happy is the only dwarf left.)