#1 is a lordhowensis. #2 is an echinata. #3 I cant ID. The only common, solitary acans in the hobby are acan maxima, but those usually are priced up with the AAA scolymias. If it starts reproducing more rapidly, I would say itll be echinata or lord, but its much too early to tell.
Very nice pieces by the way, that watermelon one could fetch a nice price IMO. Theyre very hardy and Im sure theyll regain those lost polyps before ya know it