isekai reccomendations

I'd say Remarried Empress and Your Throne (both are available on the app Webtoons)

Haven’t read Crimson but I’ve read the other and really liked these-

Death is the only ending for the villainess!
http://www.mangago.me/read-manga/death_is_the_only_ending_for_the_villainess/

Beware of the villainess
http://www.mangago.me/read-manga/beware_of_the_villainess/

Please throw me away
http://www.mangago.me/read-manga/please_throw_me_away/?vf3Z

http://www.mangago.me/read-manga/asmodian_s_contract/
http://www.mangago.me/read-manga/god_bless_you_webtoon/