Second vote for the Monfrotto 003 backlight base, partly for good stability partly for versatility. Bought mine as a lightstand with an included 3' single telescopic section, but also use it with various Mok3 inspired heat-shrink covered all-thread rod extension sections, or my own coincident LD mic bar, and it's very stable with heavy LDs on it as long as they aren't up super high. By using a short threaded stud adapter from a superclamp or equivalent, a Shure-vert will plug directly into it, without any extension for super low-profile mic setup under 9" tall.
One of the three legs is provided a threaded hole at the foot, which can also be used to attach a stereo mount or single mic. I drilled and taped the other two legs the same way for small triangular Decca tree-like on stage setups. That also allowed me to used this base inverted and flown in the air as a triangular mic bar atop an extension a few times, clamped to a stair railing. Worked out nicely.
Few old photos of non-standard uses of this base-
First two with the custom coincident LD bar mounted directly in it without an extension;
Second two with LDs attached to the end of each leg, and nothing in the center;
last also with the 3 LDs and the Shure-vert in the center.
Wonder if I have a picture of it flown upside-down somewhere..