i'm going to be the outcast of the group and say the ebjd, yes it is hard to find healthy fish at times but its a beautiful fish full of color, and a lot more uncommon to find a full grown ebjd than a gt....just my opinion
I love my gt absolutely stunning color and has a great personality. Want a kinda oddball for a 75g? Get a tilapia butti, by far most playful fish I've ever seen or had
Just throwing out that a wonderful solo fish in a 75 would be an Oscar. Super personality and easy to care for.
That said I am very partial to them having kept 2 breeding pairs.
Also the EBJD's are so beautiful IF you get a good strain that won't flop over on you. PM me if you decide ebjd and I'll refer you to who I got mine from.