Are you ready? Let's go
Older ones (2016-2018):
Memory Lost (Check all seasons - not very long don't worry)
The King of Romance (Taiwan)
Newer Ones (2019-2020) :
I've Fallen for You (Historical)
Love is All (Historical)
My Dear Lady +1
The Romance of Tiger and Rose (Historical)
The Romance of Hua Rong (Historical)
The Sweet Girl (Not exactly modern or historical)
Parallel Love (Ongoing)
They all include Romance as a plot, some may be a bit less intense and some may be a bit more focused on the storyline. All in all, most of these dramas are amazing being it through the romance or the storyline. I highly suggest watching the Romance of Hua Rong and Parallel Love!