I want yaoi manga suggestions with great art but also great content.Im looking for something similar to Katekyo! Where the seme is possessive and gets jealous easily but is also nice to the uke and spoils him.Oh they should also have lots of sex😋

A personal favourite of mine is Rhine no Bara. I don't know if you'd like it though, as your description was rather vague 😛
Anyway, it's the only yaoi I've actually felt the need to spend money on so far, well there is another one but it's not published in English