Solarglide 3. Has the dense Boost that keeps it's absorption for 600+miles it's reinforced laterally with hardened Eva so not like your on balance beam with ultraboosts. Weight Wise I think it's just under 11oz so not the lightest but on par with Glycerin, Triumph. Also the Continental stretchweb is unreal traction on snow/ice. If you get the all white version the 3 stripes are highly reflective initially I'd say the feel is on the stiffer side but it starts to wear in at 40miles. Boston 10 definitely as it's ultra durable with boost but the use of it makes it 8.5 oz.
For another workhorse daily you could also consider Supernova. Perhaps it's less durable, more flexible and suited to lighter runner? About the same weight as Solarglide 3...