The R44 with fixed floats:
Depends on float PSI and aircraft weight, but will sink pretty low, when heavy it will sink well past the black area on the floats, leaving just a couple of inches, at best, between belly and water.
Here: R44 Clipper II, 2 POB, 1/2 Fuel, around 3 PSI.
http://www.sloanemallorca.com/assets...gallery/68.jpg