Klopp played Lewandowski as a 10 behind Barrios I think for one season, but after that I think Lewa was pretty clearly the focal point up front. If anyone can correct please do, Indidnt watch Dortmund that much back then.
Of course sometimes on the break he might run wide but overall he was a straight-up CF. Behind him Götze, Kagawa and later Reus had license to roam, though.
I don't think Auba was really known as a striker when he first went to Dortmund. He was behind Immoble and Ramos in the pecking order for a bit, I think, and that's why he was playe dont wide, but then discovered his potential when Klopp moved him up front.