Yes, The Vanishing could be considered a goth band because they play Darkwave and Deathrock, which are among the core subgenres of goth music. Albums like Songs For Psychotic Children, In The Bat Haus, and Still Lifes are Failing are examples of their goth sound.
One of the other goth artists that is similar to them is Altar De Fey.
The Vanishing is located in United States, California, San Francisco, active in 2002 — 2009. You can find more information about The Vanishing on their GothDB band page.