
Exped
MegaMat Series
Car camping comfort champ, but some side sleepers find it thin.

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Agree here. If summer mat is what you're looking for, you can get something like the Versa line, which I don't think they make any more, but stockists still carry the line, and it's usually fairly cheap. The Bestway Alpinelite is pretty decent too - I have both (Versa 2R) and find both of them comfortable. The Ridgelite I've not used but spec wise is pretty similar to the Alpinelite, but is built with a lower denier material so may be more prone to tears and seam rips possibly.
Modern-day insulated inflatable hiking pads are 3 to 4" thick and the comfiest are miles better than anything I've seen any military force use. Reliable brands include Thermarest, Exped and Sea to Summit, with the latter having an "air sprung cell" structure I find the comfiest of them all. Model names include Neoair for Thermarest, Versa for Exped, and Etherlight and Aircell for Sea to Summit. Add an inflatable pillow and you're set for an actual night of sleep instead of just waiting for time to pass. Some bag manufacturers make wide or extra wide models. I'm not as well updated on bags.
I've had four Expeds. Still have two. Both have the built-in pump. One has synthetic fill. The other has some down insulation which makes it good for ~10F colder than without. The first two developed tiny leaks (could not find them even with submerging). They were a few years out of warranty. Exped still replaced both. I appreciate a company that stands behind their products. I also like side-sleeping. I have not used these as much as what you will. So durability...🤷
I was using a backpacking style exped inflatable pad and recently replaced it with a self inflating one. Takes up a lot more space but far more comfortable (and quiet!).
I have an exped pad for backpacking and I love it. Most comfortable one I’ve ever used
I had a Tensor and it was uncomfortable for me as well. I’ve found Exped inflatable pads comfortable. My favorite right now though is the Neoloft.

Exped
MegaMat Series
Car camping comfort champ, but some side sleepers find it thin.

Exped
Ultra Series
Lightweight side-sleeper comfort, but a bit pricey and bulky.

NEMO
Tensor Series
Ultralight side-sleeper comfort, but slippery and prone to leaks.

Big Agnes
Rapide SL Insulated Sleeping Pad
Comfortable with side rails, but heavy and warmth claims disputed.

Therm-a-Rest
NeoLoft™ Sleeping Pad
Very comfortable, good service, but heavy and bulky for backpacking.

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Therm-a-Rest - NeoAir Xtherm Series