That's a rather involved question for something so ambiguously worded
First, you have to have corpse mode enabled for bots to leave corpses. This is in the general tab in the options form, IIRC.
Second, bots have to use shots to feed from corpses. -1 shots (which animal minimalis uses) can get nrg from a corpse, but it's hard, hard work and takes a long time. The more effective strategy is to use -6 shots, which pull nrg primarily from body instead of nrg (dead bots have no nrg but a lot of body).
So any bot which uses shots can feed from corpses. Any bot that uses -6 shots can feed from corpses effectively. There are plenty of both types in the bestiary, if you want to look around. Search the DNA for .shoot store and look at the number before it. If it's -1, then it's not an effective corpse feeder. If it's -6, then it is.