6'2" here or 187cm for the continent. I ride L or 19" frames, but (apologies) I quite like the modern longer Top Tubes (24"). I've been eyeing retro steel frames in the for sale section but I struggle with the TT on most 19-20" frames. Tips are appreciated.
The 6'4 and 6'6 guys should really have a look at a 29er, they really bring proportion into it. And there are quite a number of well crafted steel rigid examples available, also in the UK. There's On-One and one of my favourites, the Singular Swift. Both have Singlespeed roots but do come in geared versions too.
Enjoy!!