By the way, I do not know many series from Sunday.
The only manga I know and read is Komi-san wa, Komyushou Desu.
Komi-san is a series that I'm simply loving, the manga always makes me laugh.
I'd like some suggestions.
I'll give you some suggestions, but fair warning, the majority of these will be romcoms and comedies. But since you like Komi, I'm assuming at least one or two of these will work for you. Here's what I read in addition to Komi-san:
Amano Megumi wa Suki darake! - An ecchi romcom. Really slow progress relationship-wise, but I enjoy the gags. The series has gotten better over time, the newest characters introduced seem promising, and my least favorite character from the beginning (the teacher) has basically been nowhere to be found for the last 50 or so chapters. Caught up in English
Tenshi & Akuto!! - A comedy with light romantic undertones (growing as the series progresses). It's about voice acting; a pompous guy with a girly voice and a girl who's a few years younger than him that's already a professional. There's also a large supporting cast of supporting characters who are also great. An underrated, under-read series in English. Unfortunately, only 16 chapters are in English right now, but the translation is not dead (a chapter was just released a couple days ago). Translations are into the 40s if you can read Spanish.
Hoankan Evans no Uso ~Dead or Love~ - A romcom. Set in the old West, it's full of some nice gags. The setting and adult characters are also refreshing to see. The chapters are only about 10 pages each, so this one wouldn't take as long to catch up on. Caught up in English
Maiko-san chi no Makanai-san - A slice-of-life with light comedy. This one is truly special. Another shorter page count series, it manages to accomplish so much, and frequently with very little dialogue. You end up rooting for every character, but especially the main girl. She's always optimistic and positive, and it is infectious for both those around her and the readers. Basically caught up to present in English.
Maoujou de Oyasumi - A comedy. A nice fantasy setting with unique monster characters. A captured princess wants to sleep comfortably in her new whereabouts and will do anything to make that a reality. The series got better for me as more characters were introduced over time. Translations are about halfway to current Japanese chapter (40-something out of 80-something I believe)
Dagashi Kashi - A comedy with light, occasional romantic undertones. You get to learn a lot about Japanese candy and snacks in a pretty unique way. The girls are super cute, and the "action" scenes (without spoiling any) are really funny. Translations are a bit over halfway to present Japanese chapter (100-something out 170-something). The translator on 4chan has also been doing translations for the most recent chapters along with the chronological order, but I recommend waiting for the translations to catch up naturally.
Marry Grave - A new comedy/action/tragic romance series. A man has to go around gathering items for a recipe that'll bring his deceased wife back from the dead. The artwork is phenomenal, the expressions vibrant, and the panels convey an amazing sense of movement. Translations caught up in English
Hatsukoi Zombie - A romcom. A guy gets the ability to see all males' "first love zombies," and then deals with various peoples' issues, including his own. His own personal love zombie, Eve, makes this series worth reading in my opinion. Watching her grow and become more human has been endearing. I've simplified the love zombie concept and major characters quite a bit to avoid spoilers, but it's pretty good. Sometimes gets a bit too dramatic for my taste. English translations almost caught up (90-ish out of almost 110; looks like the group doing it needs a new translator)
King of Idol (KOI) - A gender-bender comedy. A boy wants to become an idol (for reasons I will not reveal due to spoilers), but must go disguised as a girl to get into the best idol training school. He meets other girls and hijinks ensue. It has been decent so far; I'm willing to learn more about the world the author is developing. English translations it seems have stalled out for the time being (about 10 out of 30 translated)
Soukyuu no Ariadne - A new adventure series. A boy wants to travel and learn more about the world, and he ends up doing so with a princess from another land with a similar goal. It's not usually the type of thing I read, but it has been decent so far. I like fantasy vibes, so I'm curious to see what it'll introduce. English translations caught up to present.