Welcome to the prog-metal rabbit hole. You have a many discoveries ahead. Are you familiar with this site? Lots of fun exploration to be had...
http://techno.org/electronic-music-guide/
I recommend prog-metallers Leprous (Norway), they are also growl-free IIRC. Also Cynic (US)
I don't mind growls at all, and for the likeminded I'd wholeheartedly recommend the quite proggy tech-death metal band Gorod (France) . Yes, they DO mix samba rythms and metal guitar, and all other kinds of weird schiit...