Some good and bad things I have tried are:
Arcade Gannon works really good with Q-35, but I don't prefer him without the armor you get from his quest, which I take from him anyway.
I gave Raul my Ranger Sequoia once, of course I saved before I did it, for some reason he would not use it and attack with his fists.
Boone, this one was quite devastating, I gave Boone Mercy, and a large of amount of ammo that was a ton of caps to buy. He was a monster! I traveled to Cottonwood Cove, and charged in. He litteraly destroyed everyone in that place, there were a couple veterans left when he got knocked out. :mohawk: