There are 3 rare switches made by cherry that are in the range you want: MX Super Black (linear), MX Ultra Blue (clicky), and MX Super Grey (clicky) -> (I was actually the one who coined Super Grey long ago, though I have yet to acquire any of the Super/Ultra switches...). Ultra is the term designated for switches that are stiffer than Super, and Super is already stiffer than current production. There is probably a Super/Ultra tactile switch out there, but it has yet to be discovered.