I personally wouldn’t trust an endli and moke together due to size differences, but I’ve seen it work before.
I suggest getting the bichirs around 8-10” to begin with, so your tank won’t look so empty.
Start 1-2 x endli at a smaller size compared to the rest of the bichirs, they would grow faster compared to the other upperjaws and have a reputation of cannibalism when younger.
I don’t have experience with American tigers, or hujeta, I’ll let other ppl chime in. I know hujeta gar and bichirs is okay, but I’m not sure if hujeta are suitable with tigers.