I measured some of the LDOs on hand, some that I brought back from today's meeting.
All LEDs were removed(*) and the source was 5v from USB.
One 1117 that I had for a while seeped 2.3mA (without load).
Another cheap pair of devices, each has a 1117 attached to a USB dongle (no uart lines) to extract 3.3v. One uses 115uA and the other 83uA. I am surprised - these are good numbers.
The 1117 board from @clixx_io used only 45uA. Again this was unexpected (David, what is the source for these?). An older @clixx_io board gulped 4.3mA... talk about variability of the 1117s.
The 1825S from @Harvs were not all the same. One took 125uA, two others 115uA, and the fourth I forget but I think it was also 115uA or less. The esp when in deep sleep uses 150uA with this one (it is now set up and running as a test).
Naturally the voltage drop is important here and this I did not yet test.
(*) About LEDs. I had great difficulty desoldering these tiny smd LEDs, especially when they are in a tight location. Then an accident showed me that with a little push the LED will just pop out, they seem to be very brittle. Nice and easy.