You forget Kollmorgen, Stith, Bausch & Lomb (USA), Fecker, Schmidt and Bender,
Leica, Weaver, Leatherwood, Bushnell and many more.
My current "best buy" winner is the Simmons 8 pointer. Cheap, as good as a Leupold Rifleman optics wise, shoots the square well, has click adjustments, euro focus down to 20 yards.
Been pounding a 2-7 on my beautiful savage 9.3x62 Euro and it jusy keeps ticking !