Hey there! I took a look at your list and found some good romance manga that you haven't read yet.

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Veil
I think this work is just universally good. It captures the fleeting everyday moments of our protagonists. With no clear story, this manga really focuses on the atmosphere and the emotions in each moment. A true gem!

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Ao no Hako
When I first heard of this and saw all the hype surrounding it, I thought this really can't be good. On one romance-starved night however, I gave this a chance and who would have thought it, this manga actually far exceeded my expectations. As you are currently in a similar situation, I urge you to at least give it a try :)

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Kimi wa Houkago Insomnia
This one is just solid. It's more than just romance which makes it a good manga overall. It has many memorable moments and the characters are kind of quirky. The art is also a highlight of this work in my opinion.