Full synth… 6-operator DX7 algorithm based… Can import (and export) DX7 SysEx files (either VMEM 32-voice, and VCED single-voice). But this synth voice is under development (and not freeware, the free/demo version have some restrictions). Monster (by size): 117 HP !
https://community.vcvrack.com/t/6op-dx-module-development-blog/25408/33
I don’t have found any FM operator-like module who provide a DX7-like envelope generator, all of them are using ADSR, as you’ve mentioned.