Welcome to the forum. Sorry to hear about your losses and hope you find a friend for Wilder when you're ready. Hope your son in laws treatment goes well too
Yes, welcome to the forum. I saw your BRAT form and can assure you we have quite a few dogs in foster care right now. Hopefully you will find a buddy for Wilder soon.
Most people incorrectly use the terms dominant and dominance with regard to dogs. Here is a good blog post by Dr. Sophia Yin on the topic.
http://drsophiayin.com/blog/entry/dominance_in_dogs_is_not_a_personality_trait