I would not accept any of those three, either. I don't think it's unusual to interview three and not find anyone suitable yet. IMHO, you had the right instincts about all three. So I would keep looking, knowing that my gut instinct was crucial to the decision.

About videos: Yes, seeing the work actually being done (in any area, from marker training to dominant-aggressive dog handling) is big. Listen to the podcasts, too, while you wait for videos.

I've had him on a leash or in the crate all day today and yesterday and he seems pretty annoyed with it, lol. I don't mind his annoyance, I just think it's funny. He doesn't like following me around the house while I do laundry and such, but every now and then he attempts to refuse to come along for a second, until he realizes he doesn't have a choice. Just that has already drastically reduced his attempts to charge doors, although at this point I know it would immediately return should I take him off the leash.

He is fed raw foods once a day, so no grazing. I haven't had any set time limits, though. Is 20 minutes reasonable? That's about how long it usually takes him, I think.

One thing I was wondering is how to keep him from becoming possessive about his crate. I'm a little concerned that eating in there and being in there a lot might make him act crazy about his crate, which he never has before. My concern might just be because we adopted a dog like that when I was a kid and he was REALLY bad about it - we had to give him back because he attacked my sister when she walked by one day. I don't know how common this is, but I don't want my dog to get that way!

The crate is a "safe" place for the dog. Feeding in the crate and leaving the room (shutting the door to crate and the room both) will help with possessiveness while he is eating. With all the issues going on, I think restricting his freedom with the crate will prevent more problems than it could potentially cause. A few safety tips: don't reach into the crate to get him, call him out with a treat in one hand, leash in the other. (close the laundry room door before opening the crate if possible) Don't reach in for the food bowl when he is finished, take it out after the dog is out. If the dog is in the crate and you are doing laundry, take him out FIRST, close the crate door (dog on leash) and do laundry. This way, you don't have to reach over the crate (which can avoid him getting defensive while "trapped" in the crate. You can also try covering the crate when he is in there to avoid him getting triggered by someone walking by/working etc.
I'm sure is is a bit annoyed, but oh well. He is used to doing what HE wants so that is bound to be a bit of a wake up call. Another thing, when he needs to go outside, take him out on leash for now to do his business. If you give him off leash time in the yard to play, he must earn it by doing something first (sit, etc)It would probably be best to not let him off for any reason right now, just take him on walks etc to get rid of energy. Crate or leash, 100%. 20 mins is fine, I wouldn't give any more than that. (I usually give less) If aggression is a big concern over feeding leave the leash on in the crate when you feed (just don't go too far away) with the end outside the door, that way he is already leashed to bring him back out and you can grab the leash before opening the door. Definitely pass on all those trainers mentioned. You can try asking at the police station for what dog trainer they use - many around here contract out for issues they encounter. In the meantime, I would learn all you can about what a GOOD trainer does so you can know what to ask! Read, read read and order those videos. ;-) Good job on the leash work!

I wanted to mention also: the dog from your childhood *might* have been having some other issues, not just the crate possessiveness. Many times a dog will have many dominant/aggressive/fearful tendencies, but the only "problem" that is noticed is the most obnoxious one. Re-establishing who is in charge, and being stricter with boundaries should help balance out the dynamics in your house. I wouldn't NOT crate a dog because of a problem that *might* happen, but I will crate a dog to prevent a problem - like resource guarding (guarding the food)