I am also partial to the "Mark VI" used in Star Trek VI, because it seems to cover a couple of the problems, like it has a real physical safety toggle, and no "secondary trigger" from having a smaller phaser locked into a "booster handle". In other words, it looks like it might be a real weapon, not just a hunk of gun-shaped plastic. The "tracking plate" in the grip was a nice added touch, and they actually used it to keep track of the props for check out.

To date, none of the phaser designs (or any other species' variant thereof) include any sort of trigger guard, and TNG and later Type 2 models suffer the added problem of "I don't want it to look like a gun" without thinking about why the gun shape is actually a thing; they were definitely bending it back into a gun shape in Voyager because they were finding that the actors couldn't actually point the things any more than vaguely in the direction they intended to fire, plus where the hells do you put a trigger guard on it. And don't even try to pass it off as "fingerprint recognition" tricks; when you want a trigger guard, you want a real one the operator can actually rest their trigger digit onto so they themselves know directly that they have that digit OFF the trigger entirely, plus keeps that same trigger from being pressed at all when it gets bumped.

And the Type 1 pretty much fails on so many levels, except possibly as a concealable, defensive-only sidearm. You don't want to rely on it for active combat. That's one of the few things TNG effectively got right with the idea; it wouldn't be an external module in a weapons system, it would most likely be a completely separate weapon, issued when the Type 2 would be provocative and/or obvious.