You should make a way to move your alts. There are proably 4-5 different ways to do it so pick one that works for you. I have a button that just moves my alts backward or forward without moving my main. I use the arrow keys to move all my chars. You can just press the movement key just for a sec, and your alts should break follow. That is how you park your chars.

The post as I understand it is, "My hunter is pulling aggro and I can't keep him at range to keep shooting". Parking his hunter does nothing since even if he could move all around, the hunter is still pulling aggro. He will just constantly be in melee range. If he works on not getting aggro on the hunter, he will be at range all the time.

You can use the same button on your main and your alts to do two different things. Maybe your main is a warrior tank, on the button you use for charge on your main, you put move back on your alts. So when the warrior charges, the alts get parked.

Other things that break/don't break follow. Sitting won't help, they will just stand up. Jumping doesn't do it either. Pretty much any movement works, doesn't have to be just forward or backward. Strafe, rotate, etc work. Moving up or down when swimming or flying breaks movement. So if you are trying to get out of water onto a ledge, and you jump thinking, that will help, it breaks follow. So you have to do jump, then follow, then jump, then follow and hope one of them lands.

Hope that helps and good luck.