Jeff, welcome to Axiom. What you propose shouldn't create a significant problem of obstruction. The sub will be placed below the screen and apparently partially below the VP150. The omnidirectional low bass frequencies will spread around partial blocks without appreciable loss of energy.
The corner location would give the strongest output for a single sub, but excites all the room modes and may not give the smoothest response. Although arrangements of two or more subs are available to smooth the bass response(e.g., one in the diagonally opposite corner), moving a single sub has limited room for improvement. One possibility for reducing some(but certainly not all)of the modes is to move it out of the corner 1/4th of the way toward the opposite side wall. You might also give this a try, but might find that the corner location is on balance the best.
