
NEMO
Disco 15 Series
Spacious spoon shape, but bulky and inconsistent warmth.

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If you get two of the same sleeping bag then you can zip them together, my wife and I did this for years. If you can find a used Nemo Tango Duo quilt system then that's pretty sweet. We have used one many times and it's a good system. They don't make it anymore though, so eBay is your best bet.
This. I hate mummy bags. I move too much in my sleep. My Nemo takes up a bit more space in my pack but it is so comfortable and a good night’s sleep, where I can fully roll around in my bag, is worth it. I will never go back to a mummy bag.
It might depend on how you're built, but I can get my leg up like that inside my Nemo bag. I have short legs, though.
I really wanted to love the Nemo, but if OP is a smaller person, Id warn they have too much dead space.
Nemo. Best sleeping bag I have used. On my second one.
I'm a side/stomach sleeper and love my Nemo sleeping bag. I have a synthetic one and it's quite bulky, but the down ones would compress better.

NEMO
Disco 15 Series
Spacious spoon shape, but bulky and inconsistent warmth.
Hammock Gear
Classic Burrow 20°F
Budget-friendly quilt; very warm, but not ultralight.

NEMO
Disco 30
Roomy spoon shape, but bulky and prone to zipper snags.

Katabatic Gear
Alsek 22°F Quilt
Premium quality, very warm, but high price for weight.

Neve Gear
Waratah
Great warmth-to-weight and value, but untreated down.

Ranked #1
NEMO - Disco 15 Series

Ranked #1
Kelty - Tru.Comfort Doublewide 20
Ranked #1
Enlightened Equipment - Revelation APEX

Ranked #1
NEMO - Disco 15 Series
Ranked #1
Hammock Gear - Classic Burrow 20°F

Ranked #1
NEMO - Disco 15 Series