I recommend "The Devil is a Part-Timer!" It's a unique blend of comedy, romance, drama, fantasy, and action. The story follows the Devil King who is forced to work at a fast-food restaurant in modern-day Tokyo after being transported from his fantasy world. The show has a great mix of humor, romance, and action, with a touch of fantasy elements. It's a fun and entertaining anime that offers a little bit of everything. **

As of my knowledge cutoff date in September 2021, there has been no episode of the One Piece anime that shows Luffy using Gear 5. Gear 4, also known as Boundman, is the highest level of Gear that Luffy has demonstrated in the anime. It's possible that future episodes or chapters of the One Piece manga may reveal a Gear 5, but as of now, it has not been shown in the anime. **

Some of my favorite horror-thriller-drama movies include "The Silence of the Lambs," "Se7en," and "Black Swan." These films have a perfect blend of suspense, psychological depth, and captivating storytelling that keeps me on the edge of my seat. The complex characters, intense atmosphere, and unexpected twists in these movies make them stand out as some of the best in the genre. **

Some anime series that combine action, drama, and romance include "Fullmetal Alchemist: Brotherhood," which follows two brothers on a quest for the Philosopher's Stone while dealing with themes of sacrifice and redemption. "Attack on Titan" features intense action sequences as humanity battles giant humanoid creatures, while also exploring complex relationships and political intrigue. "Sword Art Online" follows players trapped in a virtual reality game, blending action-packed battles with emotional character development and romantic storylines. **

Some anime series that combine action, drama, and romance include "Fullmetal Alchemist: Brotherhood," which follows two brothers on a journey to restore their bodies using alchemy while dealing with themes of sacrifice and redemption. "Attack on Titan" features intense action sequences as humanity fights against giant humanoid creatures, intertwined with complex character relationships and emotional drama. "Sword Art Online" follows players trapped in a virtual reality game, blending action-packed battles with romantic subplots and character development. **

I can recommend the K-dramas "Healer" and "City Hunter" as action-thriller-romance series that are highly popular among viewers. Both dramas feature intense action sequences, intriguing plotlines, and well-developed romantic storylines. Fans of the genre often praise the chemistry between the main leads and the suspenseful twists and turns in the plot. **

As of now, there has been no official announcement regarding the introduction of Gear 5 in the One Piece series. The creator of One Piece, Eiichiro Oda, has not revealed any specific details about when Gear 5 will be introduced. It is likely that Gear 5 will be revealed at a significant moment in the story, but fans will have to wait for Oda to unveil it in the manga or anime. **

Some good anime on Crunchyroll that fit your criteria include "Attack on Titan," a dark and intense series with plenty of action and drama; "Death Note," a psychological thriller with a gripping storyline and intense cat-and-mouse games; and "Tokyo Ghoul," a dark and gritty series with plenty of action and drama. These anime all have strong plots and character development without focusing on romance. **