Great question. And with the caveat that it costs less than the rifle you put it on-have to go with Leupold VX3HD 4.5-14x40. Side focus, windplex, zero lock- Perfect features for $750 and under a pound.
Lewey 2-7X33 or 2.5-8X36. I have about 15-20 each, and never had a single hiccup in about 45 years. I switched to the latter, when they discontinued the former. They'll get it done out to 400 yards or more, though I don't shoot game past 300.
Really love my Vortex Razor lht 3-15x42. Good magnification range and lightweight. The reticle is my favorite out of anything I’ve used and can’t beat the warranty.
I have a Nightforce NXS 2.5-10 X 42 Compact. I haven’t hunted it a lot but think the ilum on the reticle is a little lacking. I am also finding I like more magnification.
if you made me pick a do all scope right now I would say Nightforce NX8 2.5-20x50. I would take the weight penalty for the extra magnification.