Dark Souls 3 & Dark Souls 2: Scholar of the First Sin.
Personally Dark Souls 2 is my fav of the Dark Souls Trilogy and the updated Scgolar of the First Sin solidifies it for me.
When you compare DS1 with DS2 both feel unique, like the story has moved on to another time from it's previous old time self, from Lodran to Drangleic, from Gwyn to Vendrick, from Manus to his Daugthers of the Abyss, from Artorias to Raime, from Kaathe to Aldia, in DS2 you could feel that time has since then moved in DS2, to me Dark Souls 2 is the only sequel to Dark Souls.