Accepting compliments (without rejecting them)
This question is a bit self-contradictory to me.

On the one hand, you asked for responses in keeping with Chinese culture's "highly [valued] modesty and humility". Yet on the other, you explicitly ruled out a customary phrases doing exactly that. Is there a specific issue you have with 哪裡哪裡 or are you rejecting all similar phrases?

Perhaps there's some misunderstanding here. Phrases like 過獎了 or 哪裡哪裡 and equivalent are hardly "overhumbling" or "belittling". They are in fact simply standard ways of accepting compliments with appropriate modesty and humility, as the question asks for. It would not be understood by most people as "rejecting" a compliment.

Having said that, you don't have to take "modesty and humility" into that much consideration. To levelly accept compliments without trying to show those virtues, simply use 謝謝, a plain "thank you".

Or you can straight up translate English into Chinese:


你喜欢让我很高兴 - I'm glad you liked it.
得到你的夸奖很高兴 - I'm very happy to hear your compliments.
你太仁慈了 - You're too kind.