Its an interesting interpetation ToMacco has on that line from ESB.
I had always thought that it was just Yoda's way of saying (in his fractured English) "I keep my own counsel on who is trained". And I think he used the word "counsel" meaning advice rather than "council" which means a group meeting to discuss something - two words that are spelt differently and have different meanings but sound the same - God bless the English language!
So what Yoda meant was " I don't need anyone to tell me who is right to be trained". I still think this is the meaning of the line - more than anything else because the Jedi Council seem to treat one another as equals. I find it hard to believe any other them (especially Yoda) would claim it as "his" council, even if he were the head of it.
However, to placate ToMacco it does seem clear that Yoda is the most senior and respected figure on the Council and that you don't have to be the head of something in order to be the person that leads it.