I'd vote "No". A 75g isn't large enough for either JD or Midas once they're full grown and both species have been known to take out fish larger than themselves. Once they've had a chance to claim a whole tank to themselves, introducing new tankmates has even worse chances for success.
In the event you disregard this advice and toss a JD of the same size in w/ the Midas, and it survives the first day, I'd be inclined to put $10 on the JD, to be collected in a matter of a week or two.
Personally, I'd just plan on keeping the Midas alone until it needs a larger tank. If you go for a 240g at that point, you might toss it in w/ some XL Sevs/Terrors/Acaras/Tx etc. etc.
< not an expert, but have extensive lone JD experience, some exp. w/ other SA Cichlid species...