With good pedigrees you might consider having the horses broke to ride with basic training so they can be sold as good ranch horses. Young working horses still bring decent money around our area and would more likely go to a decent home and be taken proper care of.
I agree with this too. Not sure if you are a Facebook user or not, but if you are there are several pages strictly for horse and several for farm related. Try looking for or asking on those pages for reputable horse training services. You'll likely find a good source that can relieve you of your trouble makers and regime them to a great home where they will actually have a job. If you find someone willing to buy them, then that's just an added bonus.