Ok, i'll give you three videos of two different horsemen that deal with that type of horse, so you'll have a better idea of what you can do, but always ba aware of your body language, if you don't it won't work and possibly make it worst. I prefer the third method, less aggressive.
I've done a ton of ground work lessons with him and every time I get after him hard he gets really mad and strikes out at me. Sometimes he will stop for a month and will be really good and then before I know it he's started again. I've had advanced equestrians work with him and he's always fine. The problem is when I first got him I didn't know how to deal with it and he knows that and so he always is agressive towards me! When someone he doesn't know comes in and gets after him, he quits it 99% of the time! I get after him just like everyone has showed me but he always knows it's me and isn't scared at all.
Do you want to say that he bites you? If it is the case, it's because your horse don't respect you, he don't see you as a leader and is trying to show dominate, he don't want to give you the leadership role and you have to make your horse become submissive by ground work, liberty if possible. Make your horse respecting your own space, make his feet moving (never yours first). A horse shows dominate by moving the feet of the lower horse, you have to do the same.