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I like For King & Parliament: gives a good fun game with lots of flavour and plenty of figures on the table.
It puzzles me that people recommend Pikeman's Lament. I have played quite a few games of this rule set, and while they were fun games (mostly due to the company we kept), the rules bear ZERO relationship to the ECW, 30YW, etc. Fun games are possible....but do not expect anything resembling the ECW.
They are a generalist set for certain and although not a perfect representation, work fine for large skirmishes (more than a handful of figures) of the era; and possibly most importantly, there is no competition for that scale of game.