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Lots of threads here on tires. If you don't want a dedicated snow tire there are some great all-season options. I'm purchasing either the Michelin Pilot A/S 3+ or the Bridgestone Quiet Track in 245/40/19. Any summer only tire will have a stickier compound and reduce range.
For the ultimate in LRR you could go for a tire like the Bridgestone Ecopia but it's gonna handle like crap and provide a lot less traction.
If efficiency is paramount, then the Pirelli Cinturato P7 A/S Plus (original or II) is probably the frequently mentioned tire I've seen mentioned in various threads. Just know that the wet traction and stopping distance are awful in Tirerack tests of the original version (II isn't tested yet).