After a mysterious death, King Grey is reborn as Arthur Leywin on the magical continent of Dicathen. Although he enters his second life as a baby, his previous wisdom remains. He begins to master magic and forge his own path as the years go by, seeking to correct the mistakes of his past life.
The Beginning After the End is finished and has 12 Episodes. It is also Known as: 最強の王様、二度目の人生は 何をする?, TBATE
Top 5 Anime Like Saikyou no Ousama, Nidome no Jinsei wa Nani wo Suru?
5. Mushoku Tensei: Isekai Ittara Honki Dasu

When a 34-year-old underachiever gets run over by a bus, his story doesn't end there. Reincarnated in a new world as an infant, Rudy will seize every opportunity to live the life he's always wanted. Armed with new friends, some freshly acquired magical abilities, and the courage to do the things he's always dreamed of, he's embarking on an epic adventure—with all of his past experience intact!
Mushoku Tensei: Jobless Reincarnation is finished and has 11 Episodes. It is also Known as: 無職転生 ~異世界行ったら本気だす~, Mushoku Tensei: Isekai Ittara Honki Dasu
4. Dekisokonai to Yobareta Moto Eiyuu wa, Jikka kara Tsuihou Sareta node Suki Katte ni Ikiru Koto ni Shita

"I can finally go search for the peaceful life I've been looking forward to since my past life."
Allen, a boy called a failure because he was not blessed with a "Gift" from god, is actually a former hero who still has the memories and powers of his past life?! Using his banishment from his family's duchy as an excuse, Allen is about to start a carefree journey to do whatever he wants when he comes across an attempt on the life of his ex-fiancée...?!
The former hero wants to live a relaxing life this time around, but the heroic fantasy life he never wanted is about to begin!
The Banished Former Hero Lives as He Pleases is finished and has 12 Episodes. It is also Known as: 出来損ないと呼ばれた元英雄は、実家から追放されたので好き勝手に生きることにした, Dekisokonai to Yobareta Moto Eiyuu wa, Jikka kara Tsuihou Sareta node Suki Katte ni Ikiru Koto ni Shita
3. Eiyuu-ou, Bu wo Kiwameru Tame Tenseisu: Soshite, Sekai Saikyou no Minarai Kishi♀

After living a life devoted to serving his country and people, Inglis’ one wish to be free of a king’s burden and to train was actually heard, but as a beautiful girl! Reborn in the far future as a daughter to renowned knights, Inglis can now focus on mastering the martial arts. A wish has been granted, and Inglis will be on the front lines fulfilling the dream of becoming the strongest knight.
Reborn to Master the Blade: From Hero-King to Extraordinary Squire ♀ is finished and has 12 Episodes. It is also Known as: 英雄王、武を極めるため転生す ~そして、世界最強の見習い騎士♀~, Eiyuu-ou, Bu wo Kiwameru Tame Tenseisu: Soshite, Sekai Saikyou no Minarai Kishi♀
2. Knight's & Magic
A genius programmer and hardcore robot otaku is reborn into a world of knights and magic, where huge robots called Silhouette Knights roar across the land! Now reborn as Ernesti Echevalier, he uses his vast knowledge of machines and programming talents to begin to make his ultimate robot. But his actions have unexpected results...?! The dreams of a robot otaku will change the world!
Knight's & Magic is finished and has 13 Episodes. It is also Known as: ナイツ&マジック, Knight's and Magic
1. Saihate no Paladin

In a city of the dead, long since ruined and far from human civilization, lives a single human child. His name is Will, and he's being raised by three undead: the hearty skeletal warrior, Blood; the graceful mummified priestess, Mary; and the crotchety spectral sorcerer, Gus. The three pour love into the boy, and teach him all they know.
But one day, Will starts to wonder: "Who am I?" Will must unravel the mysteries of this faraway dead man's land, and unearth the secret pasts of the undead. He must learn the love and mercy of the good gods, and the bigotry and madness of the bad. And when he knows it all, the boy will take his first step on the path to becoming a Paladin.
The Faraway Paladin is finished and has 12 Episodes. It is also Known as: 最果てのパラディン, Paladin of the End, Ultimate Paladin