So the following is rapidly adapted from something I wrote on doing figures for the Spanish Armada, and might help:
Most figures from the 1580s to mid 1640s are potentially usable. While the Peascod doublet was the height of fashion, the 6 tab doublet was also around... and that was in use through to the 1630s. Ruffs were in, but collared shirts were in use too. 'Venetian' britches were coming into use, but trunk hose still lingered.
Wargear is also likely to have some variation- the dregs of English armouries got shipped to the new world afterall. Don't expect regiments of sallets or maille shirt clad infantry... But occasional figures with some might work.
I am sure this will annoy the purists, so just to say 'sorry in advance' 😃
So there is scope to work in figures from all over provided there aren't too many divergences to spoil the general aesthetic. Too many (more than 2? Certainly more than 3) 'tolerable' items should be enough to push a figure into unacceptable (and this list is far from exhaustive or authoritative!). Here's my working checklist...
(Usually there are features which negate the detractors- e.g. slashed doublet sleeves and a burgonet helmet might outweigh a buff coat and baldric on a TYW figure.)
Encouraged TYW/ECW:
Back, Breast and tassets armour
Morion helmets
Burgonet helmets
Cabasset helmets
Officers sash
Full length slashed sleeves
Doublet
Sleeveless buff coat (worn as a workmans tunic in the Elizabethan period rather than as armour)
'Falling band' collars
Soldiers Coat (technically around as a workmans jacket in the Elizabethan period, but its a very ECW look. Low status only)
'12 apostle' bandoliers
Broad brimmed hats (were around in the Elizabethan period, but again is more associated with later)
Tolerable/acceptable TYW/ECW:
Sword baldric
Monmouth knit cap
Lacy cuffs
Cassocks
Mortuary hilt swords
'Boot hose'
Flowing hair
'Musketeer' beards
Long-sleeved buff coat
Musket without a rest
Firelock muskets
Unacceptable TYW/ECW :
Lobster-pot helmet
Montero cap
Overly lacy collars
Long 'dutch' coats
Uniform appearance 😉
Engouraged Renissance:
Jack of plates
Brigandines
Trunk hose (+cannions)
Cabasset helmets
Morion helmets
Burgonet helmets
Back + breast armour (+ tassets and/or arm armour)
Target/Rondella shields
Curved stock arquebus
Rapier swords
Doublets
Tolerable Renissance:
Neck Ruff
Slashing on multiple garments (ideally only two out of sleeves/britches/torso)
'Symmetrical' slashed britches (i.e. same style on both legs)
Sleeves with different padding/slashing/etc at the top of the upper arm "split sleeves'
Fluted armour
'Conquistador' padded gambesons
Unacceptable Renaissance:
Asymmetrical slashed britches
Plain hose
Barbutte helmets
Sallet helmets
Long tunics/jerkins (knee length)
'Landsknecht' caps
No collars
Full plate armour
Excessive slashing
'Landsknecht technicolor' paint schemes 😛
Metal arm armour without back + breast plates
Shields that aren't bucklers/targets/rondella/adarga