To the OP - I imagine your Paso Fino are gaited. They are pretty to watch when they move, especially if they have the long flowing main. I particularly like the paints.
Our horses ride in a Sundowner 3H GN, so I have a little more leeway with tongue weight. My wife rides dressage. We are down to 2, a retired 27 y/o Holsteiner and a 10 y/o Oldenburg at 3rd level, both 17.2 hands. Lost our Grand Prix level schoolmaster recently to spinal stenosis at age 25, threw her head up while the vet was checking her teeth to see if they needed to be floated, she lost use of her hind quarters and went down.
Gooseneck is definitely better, with that big of horses. Over 17 hands is a long way to fall off of...
Dressage is something I know very little about. Trail riding and working cattle encompasses my horseback riding experience.
Sorry to hear you lost your horse, that way. It always sucks to lose an animal.