Liteflux LF3XT is a unique and treasured stand out among a good number of great lights that I have. Amazingly l-o-w low. Bright, punchy high. Quick to minimum, quick to maximum, quick to ramping, momentary if desired or not, if not, memory. Can be simple. Can be programmed. Magnificent beam; smooth, creamy blend from hotspot to spill, no artifacts. Super versatility, range, convenience, UI, very useful in numerous applications. A home run light.
Alternately, the Jet III Military.
And though they are not versatile due to being single output, my Malkoff M60 lamp is a dream lamp that I frequently move around from 3P to 6P and 9P hosts. Most recently into a Fivemega 18650 tube with 6P head, AW 18650 protected cell, and Z-59 tailcap.