Arranged Marriage + Healthy Relationship?

Possibly Wrong Carriage, Right Groom? The ladies are switched so it's not technically who the FL was arranged to be married to, but she and the ML get along very well from the beginning and have a sweet relationship that turns to love very quickly.

Here are my recs:

• Destined 
• New Life Begins 
• Fake Princess 

Not exactly what you're looking for, but similar:

• A Familiar Stranger - The ML and FL had an encounter in the past and each fell for each other, but were separated. The FL is forced to change faces with another woman and to take her place as the bride in an arranged marriage. It turns out to be an arranged marriage with the ML, but the FL can't reveal her identity to him.
• The Eternal Love - The leads aren't exactly enemies, but the ML is suspicious of the FL at first. Her situation ins't straightforward. The soul of a real estate agent from modern times went back in time and started sharing the body of a noblewoman. The noblewoman was sweethearts with the ML's brother and rival, which is why he was suspicious of the FL. But it doesn't take him long to overcome his suspicions. They fall for each other quickly and become a ride-or-die couple.
• The Crowned Clown - The Queen had an arranged marriage to the King. The ML secretly takes the King's place and falls for the Queen. From what I recall, they weren't really a ride-or-die couple, but they were very sweet. 
• Nobleman Ryu's Wedding - BL. The ML has an arranged marriage, but after the wedding it turns out he married the bride's brother, as the bride had run away. I wouldn't call them ride-or-die, but from what I recall they agreed to work together on the same team pretty quickly.

 Marine:

Besides the great choices already mentioned, try Sweet 18? It may differ a tiny bit from what you’re asking for as the husband does take a little longer to fall in love/realize he’s in love with his wife, but as she’s really young it’s a natural progression. They do originally fight against the arranged marriage but that only lasts like the first episode iirc, afterwards they’re really supportive of each other as people even if they do bicker a ton. 

I watched this a while ago and liked it! You're right about the bickering, though.

OH actually have you seen Kono Sekai no Katasumi ni? This isn’t a hyperfocused romance and there are little stumbles between the leads here and there but it’s a beautiful story. Although the male lead does technically “choose” the female lead as his wife based on a split-second meeting they had as children, for me this is definitely still an arranged marriage. 

 Marine:

OH actually have you seen Kono Sekai no Katasumi ni? This isn’t a hyperfocused romance and there are little stumbles between the leads here and there but it’s a beautiful story. Although the male lead does technically “choose” the female lead as his wife based on a split-second meeting they had as children, for me this is definitely still an arranged marriage. 

Yes! This is a fantastic drama!

I've also watched In This Corner of the World (Kono Sekai). Lovely drama. The two children were very briefly captured by traffickers and escaped together. Later in life, when his parents spoke of a marriage for him, he thought of this girl.

I liked the version of Wrong Carriage known as Truth or Dare. 

Was hoping that My Heroic Husband might have a continuation; although the main story was complete, it was definitely pointing towards a second part. However, she had no interest her her arranged husband initially - mostly, a matrilocal husband was necessary for her to continue as a businesswoman.

Um... what does "ride or die" mean? I don't even want to guess.