Alfalfa, Heirloom Corn and Barley are the only ones I've tried. I would consider that alternating alfalfa and barley with intermittent watering of coconut water/water mixture at a ratio of 1/4 cup C-h20 x gallon H2O if using fresh coconut water.
One of the reasons people use corn instead of (IMO) easier to sprout seeds is because of its high cytokinins. But, the same if not higher levels of cytokinins can be found in coconut water, so it's really a different strokes type deal of getting to the same result.
Alfalfa and barley mix is my preferred for veg. It takes a little planing to get them to sprout at the same time, but combining them gives a rich enzyme profile, PGR's, and the lovely triacontanol. An interesting study for triacontanol can be found here
in a 1982 journal of American rhododendron society paper. Granted it's written specifically for its use on rats and rhododendron, its benefits apply to a great deal of flowering plants from cannabis to roses.
Alfalfa SST foliars cut to a ratio of 1 part water to 3 parts SST with an added 1/8t of AgSil 16 and 1/4t of hydrated puree'd kelp can greatly enhance budset, inter-nodal shortening and overall vigor if the plant if applied twice weekly in the first two weeks of flower as the lights go off. Just make sure to not go too far into the budding cycles or go too hard on the kelp as the gibberellins in it and triacontanol in the alfalfa can lead to stretching and foxtailing in otherwise dense structures in sensitive cultivars or if over-applied IME.