Thanjs for the input!
I love the Fireforge minis, and definitely intend to use some for Templars and other Frankish Crusaders.
For Hospitallers I'm more after full sleeved tunics with mail underneath, rather than the surcoat worn by the Fireforge figures, though. Basically the same outfit as the Gripping Beast or Perry knights, but on foot.
The Essex miniatures are the right look, but I agree, a bit rough by modern standards.