7 Dwarfs are the biggest crowd of those you listed. (Jack & Sally from Nightmare Before Christmas are #1) You should line up as soon as you can - especially if your date is a Friday - Sun. or the last few days of MVMCP in December.
Lines for each of these can be as long as two+ hours. If your only priority for MVMCP is characters then you may be able to do them all. Otherwise, I’d consider two M&G, maximum, during your time.
Tuesday & Thurs. will be better nights. They aren’t, currently, Sold Out. If you are going twice I guess you can do one whole night of M&G and the other night can be the shows & etc…
Yeah, I saw what happened with @sanstitre_has_left_the_building! Although when we were there last in 2012, Tigger and Pooh took pictures together with us with no problems.