I’m also a taller rider (6’4″ ish) and find that there is a huge discrepancy between my bar and saddle height, I end up riding in something akin to a roadie aero position as my saddle invariably is about 4″ higher than my bars. It doesn’t feel as though the issue is the head tube length though but rather fork length.
It’s doubtless all in my head but no matter how high I set the bars the front of the bike feels very low, on the other hand, stick a longer fork in and it feels much better,though the angles go to pot.
The difference I think is that a longer headtube/more spacers etc results in a shorter effective top tube as the ht and seat tube angles aren’t the same. A longer fork maintains the eftt though.