Maybe a Famet?
The most bullet proof furler there is, is a Famet. It is an old design that has recently gone back into production. The halyard is internal to the unit, somewhat like a CDI (I think, not sure) but it is very ruggedly built out of aluminum. Since there is no halyard connected to the mast, there is nothing to foul, and the extrusion is held in compression, not tension. Therefore, it needs no bearings, and simply spins on a delrin disk. After nineteen years, I had to replace the disk! There has never been a major offshore failure of one of these units recorded. And it is owner installable (a lot of screws, but that's it....no headstay removal or replacement). But, of course, nothing is perfect, and the Famet's main disadvantages are weight, and difficulty of changing sails, while underway. If you have an interior forestay, or if, in any case, you can live with the same headsail all the time, I don't think you can do better. Actually, changing sails is not ALL that hard, and there are some tricks to it, but it is way harder than doing so with a more conventional furler where the halyard comes down the mast, instead of the furler.