I feel like you might know all of them but here goes:
The seme is actually a really sweet guy for this one: http://www.mangago.me/read-manga/kaeru_no_prince_sama/
your exact description: http://www.mangago.me/read-manga/aitsu_no_daihonmei/
Scary uke but not exactly a sadistic seme: http://www.mangago.me/read-manga/nirameba_koi/
Try naono bohra 's stories there is at least two to three of her manga which match your description (๑•ㅂ•)و✧
check my handsome seme. common point of mangas in this collection is the seme is really handsome and popular it mostly features nerdy plain ukes but there's a few ugly ukes too. i've also marked if the seme bullies the uke http://www.mangago.me/home/mangalist/43249/
Uke is ugly or scary (or both) but personality wise is adorable and the seme is really attractive and personality wise is a sadistic and cruel