Rank 1#
-Re:Zero kara Hajimeru Isekai Seikatsu (Fantasy World)
-No Game No Life (Fantasy World)
-Kono Subarashii Sekai ni Shukufuku wo! (Fantasy World)
-Overlord (Game World)
-Tate no Yuusha no Nariagari (Fantasy World)
-Tensei ♥♥♥♥♥♥♥ Slime Datta Ken (Fantasy World)
-Hataraku Maou-sama (Fantasy World)
-Accel World (Game World)
-Tower of God
-Sword Art Online (Game World)
-The Saga of Tanya the Evil (Youjo Senki) (Fantasy World)
-Zero no Tsukaima (Fantasy World)
-Knights And Magic
Rank 2#
-Shinchou Yuusha: Kono Yuusha ga Ore Tueee Kuse ni Shinchou Sugiru (Fantasy World)
-Isekai Maou to Shoukan Shoujo no Dorei Majutsu (Game World)
-Maou-sama, Retry (Game World)
-Isekai wa Smartphone to Tomo ni (Fantasy World)
-Log Horizon (Game World)
-Isekai Cheat Magician (Fantasy World)
-Hataage! Kemono Michi (Fantasy World)
-Kenja no Mago (Fantasy World)
-Itai no wa Iya nano de Bougyoryoku ni Kyokufuri ♥♥♥♥♥♥ to Omoimasu (Game World)
-Infinite Dendrogram (Game World)
-Mondaiji-tachi ga Isekai kara Kuru Sou Desu yo? (Fantasy World)
-OutBreak Company (Fantasy World)
-Arifureta Shokugyou de Sekai Saikyou (Fantasy World)
-Choujin Koukousei-tachi wa Isekai demo Yoyuu de Ikinuku you desu (Fantasy World)
-Watashi, Nouryoku wa Heikinchi de tte Itta yo ne (Fantasy World)
-Honzuki no Gekokujou: Shisho ni Naru Tame ni wa Shudan wo Erandeiraremasen (Fantasy World)
-Death March kara Hajimaru Isekai Kyousoukyoku (Game World)
-Sengoku Collection (Fantasy World)
-Kamigami no Asobi (Fantasy World)
-Mairimashita iruma-kun (Fantasy World)
-Isekai Shokudou (Fantasy World)
-Angel Beats (AfterLife Wolrd)
-Death Parade (AfterLife Wolrd)
-Endride (Fantasy World)
-Dog Days (Fantasy World)
-hyakuren no haou to seiyaku no valkyria (Fantasy World)
-Fushigi Yuugi (Fantasy World)

This List contains any anime that has someone transferred into another world either its a fantasy or a gaming world or a world like afterlife. these are all good quality so i recommend you to watch them all
i also love anime feet :D