yes, if you want a full master you need all of these (and there are several case toppers) as well as a sketch card from each of the 140+ pack pull artists. but i don't understand why you are so concerned about having a master set, very few nonsport collectors bother. collect what you like. Ultimately, there's always several artists whose style i don't like, so why would i bother to have one of their sketch cards in my collection?
i personally collect the base set, the various chase sets and a few sketches. i have a lot of master sets from older sets, before there were sketch cards and huge artist rosters, but i don't bother any more. The closest I have is from DC Legacy where I tried to get a sketch of each of the 30 or so characters I liked and tried to get as wide a range of artists as I could over those 30 sketches.