I recommend one of my favorite seven-rhythm poems: Wang Wei's masterpiece "Wangchuan Cabin after My Long Rain", which can be said to be his masterpiece. This poem depicts the life picture after the rain in the mountains, writes the aesthetic value, and makes people thoroughly baptized in this beautiful feeling. Wang Wei's greatness lies in that he regards life as an aesthetic object, looks at the details of life with an aesthetic eye, and then surpasses himself in beauty. There are also many poets who write seven-character poems.
I hope my answer can help you.