Shogun, ( buy the way, why Shogun?). Anyway, I still play BBall (pickup at the Y) and from time to time i get a defender doing the same thing to me. And i do think it is illegal. However, this is judgement, it is a fine line. Different officials will see this different from one another. You will just have to deal with it. The point is you are trying to get to a spot and he wants the same spot just so you can't have that spot. niether one of you got to the spot 1st. You may have to over exaggerate, i.e. become a good actor, on how much he pushed you to get a call.
There is no rule on Crowding.
Better off without the ball, NOT, I like to shoot.
1) sounds like good box out.
2) Probably a foul, again be an actor.
BUT) you have an interesting point here. The difference is in #1 you have established legal guarding position. and in #2 the defender is not in front of the dribbler.
PHEW) I don't know you so i can't say if you are a .....
Good luck and visit more often.