I believe with less water, and a good windscreen, the Vargo Decagon stove will eventually bring the water to a boil. It won't be quick, and it will be temperature sensitive, and it is not easily regulated, but it will work, and it is quite portable.

Unlike the tip-easy trangia, the Decagon has a much wider base plate, so the stove itself is not easily tipped, but a pot sitting on top would still have the same problem if it's diameter is much more than two inches.

I have in mind a couple different designs for a more stable and hotter burning alcohol stove. I am thinking a donut shape about 4" diameter, with an indented ring around the middle of the top part, roughly 1/3" deep. Inside the indented ring is a row of perforations, and a small dent perpendicular to the indented ring intersecting at each hole. You should be able to double the fuel capacity and the btus/min enough to get a liter of water boiling in about 6 minutes. You could also build a windscreen around the outside, tangent to the outer diameter of the donut, going up vertically. Maybe I will do some autocad tomorrow at work.

It would also be nice to find a packable, portable rocket stove. I may have to work on that as well.