Since you don't have enough space behind the peninsula seating for an actual eating area can you extend the peninsula into that space? That would give you more prep space between the sink and range, and you could use a tilt-out trash/recycle unit similar to the one below, which is 13.7" deep. The cabinets on the range wall could be pulled out to match that depth, which would give you a bit more countertop depth. Deeper upper cabinets would also increase storage.