If no one has mentioned it yet, look for PC/104 connectors. There are two in the original standard, designed for a board spacing of 0.600 in. Whoever makes those probably also makes other pin counts. Been too long since I bought any, so I'm blanking on names. I've use both press fit and a strange version that had little formed solder clips or donuts around the pins. No press-fit, you inserted the parts, which pressed the solder donuts between the board and the connector body, then ran it through a reflow oven. Worked perfectly first time out. Methode, maybe... Someone like that, a known-but-specialty connector company.
And you might rethink Samtec. They are fast and reliable.
ak