The pleco and the green tigers oughtta be okay-- as far as I know, the greens and the standard coloration are the same species, just different colors. The shark is more iffy, especially with your cory cats, since they're all bottom dwellers and sharks are territorial, but I'll let someone with more experience with them pipe up.
As for the SAEs, I've had 2 in a 75 gallon and they did...okay. They did better once the tank was established and they had algae and bio film to nibble. But I didn't really get to see them happy until I moved them from the 4ft long 75g into a 6 ft long 100g tank-- they went from hiding most of the time to being out and about constantly. Both tanks were heavily planted as well, and they enjoy skimming the leaves, rocks, and driftwood.
100g planted community tank
75g planted goldfish tank
29g planted betta community tank
5g planted Betta tank