2011 R41 (no longer in production) which is followed by a variety of razors slightly less aggressive FaTip, ATT H Plate, 2013 R41, Barbasol Floating (antique vintage) ...
I agree with Gary's list and would throw a wide-open Merkur Futur into the mix as well. darn near decapitation-capability there!
I've not had the chance to try the 2011r41 would but haven't my meanest razor is the Fatip Grande. its meaner than any of my old Gillettes,, way meaner than my 39c.
The Parker 94R "Hefty" is the most aggressive razor I have ever used. I piffed it. Take a look at the location of the edge of the blade.
I don't know who made it, but if you mess up with this one, you're done. Whups the drawers off the R41 any day.
Its difficult at first glance. In the photo, the 2011 happens to have the larger 'grande' handle, but I switch handles all the time. The 2013 has a slightly larger head than the 2011 version.