There are long fined peppered Cory cats and that is what you have. Pretty cool. The first one if driving me crazy because I know it but can't think of the name. I will find it.
The last on are sold in stores nder the name julli Cory cats . But the real name is something different.
Are you thinking of trilineatus for the false juliis?
I don't think it's a trili though their black markings on the dorsal fin are a bit different.. it doesn't reach down to the body.
I think the first one is definitely a melanistius but the 3rd I don't think agassizi. I kind of want to say delphax.