IIRC, someone else on this forum made the statement about elves and Abbie made the statement about dwarves, and I was not averse to either one.
I favor LII for Gandalf, and I keep wanting to type the elves as Merry because they're green and I associate that color with , but I do think that the conservatism and massive lifespans of the elves tends more toward Delta. The dwarves seem most strongly associated with industry (diligence), which is mainly a Gamma theme. While the hobbit community is described as Delta, all of the individual hobbits in LoTR seem Merry - but they are also considered strange by hobbit standards. I think that it makes sense to consider them Alphas arising from a basically Delta society (in keeping with the cycle of quadras).