@Blueeyedroan, have you tried Irideon riding tights? The “issential riding tights” are pull-on, not see-through, have sewn on knee patches, seams are minimal, and they are extremely long-wearing.
Belt loops have been added since I last bought these tights, and Toklat owns them now. Hopefully the quality is the same. Lots of colors and sizes are available. (State Line Tack appears to have them on sale, as well)