Zoom B3, Zoom B3n, Zoom MS-60B, Tanglewood something, Korg CA2, Tascam GB-10, MOD Dwarf, Line 6 HX Stomp. I've tuned basses with all of them, and more, without problems. The point being that if you have a multifx with a tuner, you shouldn't need to take a separate tuner too.
I do occasionally think of getting a Strobostomp for setting up intonation. So far I've got away with playing the 12th fret harmonic and comparing it with the fretted octave.