Hagure Yuusha no Aesthetica, No Game No Life Recommendations
First, both anime are ecchi, comedy, and action. Both anime's main characters are badass guys. They both try to save the world, having a lot of friends who help them.
Both of the main character is very op and is clearly on a different level than both rest of the characters.
Both the main male mc made a girl in the fantasy world fall for him.
Both the main male mc has a sister and is very protective of her
They are also both perverted
Difference, Sora is a neet shut-in and Akatsuki is very outgoing
In both of the anime the MCs are outcast and abandoned by their family.
Both of the male mc are not related to the sister by blood.