I would use underwood’s for something big and nasty (and have when a previous horse took all the skin off of her knee). It works well but it’s messy IMO.
My current go to is the wound ointment from E3. It’s a zinc based ointment which seems to repel bugs and help the hair grow back a little quicker. I also use Nolvasan ointment (and almost always use Nolvasan instead of betadine to clean wounds, it’s what all my vets use too now) about as much as the E3. The Nolvasan is just a bit thinner/ runnier so depending on location the E3 works better.
I also have and sometimes, rarely, use the Silver Honey. It’s okay? I have the tube of paste and the spray. I used it on my horse’s surgical site on her hoof (the spray was super helpful at first and then as it grew out I packed with the paste). It worked well and I liked that both consistencies made it so that it was “drier” than other ointments I’ve used which would soak through gauze and spread. It healed nicely but not sure it did anything amazing. I may have to use it in my next fleshy cut to see if I notice a difference.
I also have other ointments from over the years, namely a betadine ointment that is thick as all heck but will melt in the summer.