[lathspell]

Sophia - I don't think either Treebeard or Tom Bombadil was in the White Council. As is said in the LotR the White Council drove the Necromancer (Sauron) out of Dol Dulgur, mountain of sorcery. The White Council considers all matters in M-E, and neither Tom Bombadil or Treebeard do not, they only consider and solve problems in their own lands. They both have set borders, at least it is said in LotR that Tom Bombadil has set borders, which no one can see. And I believe that Treebeard has set some kind of borders as well for he never comes out of Fangorn anymore (as is said in the LotR too).

So in my opinion I think that they (and I think Cirdan must be thought of too in this case) are held Wise, but they weren't part of the White Council for they did not give any heed to Outlandish matters, especially Tom Bombadil as Gandalf points out in LotR at the Council of Elrond, when Elrond asks the himself the question if he should have invited Tom Bombadil, Gandalf answers:'He would not have come.'

In my point of view the White Council is made by two elves and three istari: Gandalf, Elrond, Saruman, Galadriel and Radagast.