I know there are a lot of romance anime but personally
this is my list:
1.Fragrant flower...
2.Horimiya
3.Angel next door...
these are my top 3
and these are all the other ones I watched:
More than a married couple, Married to the girl I hate, The Quintessential Quintuplets, dress up darling, Hokkaido gals, a sign of affection, the experienced you and the inexperienced me, and more.
Let me know if you have any thing good.