Are you aware of this website? This might give you some ideas.
https://www.bicyclerollingresistance.com/tour-reviews

I personally like the plain Schwalbe Marathon (with Greenguard), I have not felt that they were slow. If the Marathons that you tried were the Plus version, that is a different tire.

I also like the Schwalbe Mondial, it comes in two versions, the more expensive version should have less rolling resistance. I used the cheaper version in 37mm and it was good enough for my needs.

But asking what tire people like is like asking what chain lube to get. You will be flooded with suggestions.

You mention tubeless, do you have tubeless rims?