I've had pretty good luck with swinging bigger (20"+) alders using various dutchman cuts. In the following video, I used a hard dutchman to swing it about 20 degrees against its lean, then bored behind the hinge and above the back-cut to relieve tension. In effect, it DOES barber-chair, but it can only go as far up the stem as the bore. I also nipped both corners of the hinge before committing to the back-cut. I don't know if all of this was strictly necessary, but you'll see that I put it into a pretty narrow hole with no hang-ups, so it worked well enough. I'm not a production faller so I don't mind if I take a little longer and save out a bit less.
[video=youtube_share;AGdAM3CDXBE]http://youtu.be/AGdAM3CDXBE[/video]