The troll is great, but putting him on a hummock with... someone else underneath raises (haha 'raises' get it get it), the whole piece up and then some. Store bought figure though it may be, you've still made him your own thing.
Love the subtle inquisitive and/or hungry look the submerged creature has too, looks great and is a fun contrast to the troll. "Never mind me, you'd better pay attention to the angry fellow..."