My hair is medium long, about 4 inches past my shoulders, and yes, some shampoo bars can make your hair all tangly, but some react pretty well. My current bar is 25%CO, 25%Lard 35%OO 10%Shea butter and 5% Castor Oil. It is a little drying, so I cut 5% of both the lard and the CO and replaced it with Almond. I just made that about 3 days ago, so I have not tried it yet, but so far it looks good. I use cream to make the recipe so that adds superfatting.
Lard seems to be the important ingredient, as funny as that sounds. I thought I did not want to use lard in the shampoo bar, but all the recipes I tried without it tangled my hair dreadfully. Might not be the same for everyone.
I save the more expensive oils, like Jojoba, for oil treatments. Work a bit through your hair 1/2 hr or so before you wash it.
I am, obviously, still in the process of working out a good recipe--a long process! Best to you as you figure out yours!