In no particular order:
• Ban: Only member of the 7DS I can say I still like at this point despite losing his charm.
• Escanor: Gone, but never forgotten. Probably the most entertaining character of the series.
• Estarossa: He didn't existed, but he was still one of the best antagonists of the series.
• Galand: Loved his carefree and battle-loving personality, as well as the fact that he's the equivalent of an elderly citizen for the standards of the demons, apart of having a great design. Though he was the first Commandment to get rekt, he was, along with Hendrickson, Estarossa, Zeldris and Melascula, my favorite bad guy of NNT.
• Hawk: I actually disliked him at first, but he ended winning over me with his arrogant attitude after the end of the first saga. Along with Ban the only one of the main cast I like in the current arc.
• Hendrickson: Good villain when he was a bad guy and, unlike with the other human supporting characters, he wasn't shafted that much. Bonus point for tricking Ludociel by acting as his personal bootlicker to save Margaret.
• Jericho: She lost any relevance after the death of her brother, but she still has a place in my heart.
• Ludociel: May be an asshole, but was entertaining to see, in a love-to-hate way. He made Margaret hotter, and that's always a bonus.
• Melascula: Best girl tbh. Great design and powers, cute, sexy, creepy and evil at the same time and has a wonderful voice. Took all the Ls in all of her fights, but I still love her. I admit one of the reasons why I'm continuing with the manga is to see if Nakaba will reveal what happened to her after the Demon King took her Commandment.
• Zeldris: Always dig his Vegeta-like role and that he seemed more reasonable than the other demons. I also was honestly more invested in his romance with Gelda than in Meliodas's one with Elizabeth.
Honorable mention to Lord Twigo, the meme that was promised. I cannot wait the moment where Nakaba will reveal that the entire universe of the series is just a cell from one of the hairs of his magnificent mustache.