Honestly one of my favorite premises. I’ve included some cdramas and jdramas in my list. I’ve denoted when the recommend deviates from your request and how.

Best lover (cdrama)

Bride of the century - technically an arranged marriage, but the FL is pretending to be the actual fiancé.

Goong - an arranged marriage but it fits your scenario request.

King2hearts - arranged marriage

My husband oh jak doo

Something about 1 percent (remake) / 1% of anything (original) - contract dating turns into marriage at least for something about 1 percent

Perfect and casual - contract marriage (cdrama)

Begin again - cdrama

Ending again

Best lover - cdrama

Hapinari happy marriage - jdrama

Mask - see bride of the century

Tempted - fake dating

Tomorrow with you ->! Not exactly a fake marriage but they do marry early on in the show. The ml has a motive to marry the fl and then eventually falls in love. She falls for him early on though!<

Well intended love s1&2 (I think 2’s premise is better, and since it’s just a remake of 1 you can watch it independently) - cdrama.

Pretty man - cdrama.

All the interactions of fated to love you

I hear you - cdrama fake dating

Fluttering warning - fake dating