WOW sorry to hear that! my experience with Auratus is they are usually the killers. Rip Maynard
Maynard did quite well against the much larger red zebras, and they usually left him be. Eventually Leeloo and her fry overcame him by numbers. Leeloo in 2017. She now has 7 progeny (now over 4") and is over 6" herself.
. . . Maynard looks like a female. . .
I did figure this out eventually as Maynard changed colors. All the gold vanished to just the tips of fins and Maynard became very dark with white stripes. I thought Leeloo was male as well. I rescued 13 fish from an overcrowded 30g tank, and was told all the cichlids were male.
Eeeeh...I couldn't tell and didn't care.

I grabbed those 13 free fish and fled like a bandit.
Surviving 2 years later are one upsidedown cat, one BN pleco, two convicts, one red jewel, & Leeloo, plus Mojo (zebra) and Sunflower (yellow lab). I have lost four: Voodoo (bumblebee), Maynard, and two upside down cats. This has always been from agression and not disease.
Everyone graduated to a 3 tank system of 200+ gallons and I've added Buttercup and Cromwell and Photon, plus Sunshine who did not survive.
Mojo
Cromwell
Voodoo (RIP)
Sunflower
Photon
Buttercup
Buttercup and Leeloo have delivered us 7 healthy fish last year, who were not consumed by their community.
I also added a albino pleco and a hi-fin pleco, plus my two 12" plecos are in this system as well, and there is one serpae tetra remaining from my old colony.