Yes, an excellent Odin indeed!
The origins-of-Gandalf thing is a bit confused, actually; there is a picture, according to Humphrey Carpenter a postcard reproduction of Josef Madlener's Der Berggeist, which Tolkien labelled "origin of Gandalf". It's of a mountain spirit rather than Odin per se, though; he does have a broad brimmed (not pointed) hat, like many classical depictions of Odin, so Tolkien may have connected it with Odin on some level. And certainly the Lord of the Rings Gandalf is an "Odinic wanderer" without any doubt.
The odd thing, incidentally, is that Carpenter says Tolkien bought the postcard on his 1911 trip to Switzerland; but the artist's daughter says it wasn't painted until the 1920s...presumably Carpenter or Tolkien got it wrong, or misremembered. But I think this has taken us to the wilder shores of Tolkien minutiae and so, with apologies for the digression, I'll end now...
Keen to see more Norse gods and RPG characters, for sure.