Others in the thread have already given some good suggestions. In particular I will add another vote for Wotakoi and Horimiya if you haven't seen them yet. Some more that I enjoyed:

• Chuunibyou demo Koi ga Shitai!: I would classify this one as more comedy than romance, but it is a pretty good mix. Focuses on a former chuunibyou (during middle school) that has a new neighbor that is a current chuunibyou (in high school) and the relationship that they form. Along the way they pick up a crew of chuuni-adjacent friends.
• Koi wa Sekai Seifuku no Ato de: This one is more comedy than romance. The basic premise is that the leader of a sentai group of heroes falls in love with one of the generals of the evil organization they are fighting against. I adore this series and it always breaks my heart that the manga didn't perform well enough to keep it going.
• Rikei ga Koi ni Ochita no de Shoumei shitemita: This one is not as strong as the others I have listed in my opinion, but if you are a connoisseur of the genre you might appreciate it. Basically, two data scientists try to mathematically prove through statistics/experiments that they are in love with one another. So, the comedy focuses on replicating a lot of tropes from the romcom genre and then collecting data about it. This one has two seasons, but I personally think the first season is a pretty good standalone season. The end of season 2 was...a choice...but it kind of ruined a lot of the good work done elsewhere in the series.