yes, there are even several of them already existing, including on the top20 iirc there was a totem/devil archon 
.edit yep Archon, Level 100 (GD 1.2.1.6) - Grim Dawn Build Calculator
“immortal” army pet dervish been semi famous for years for the memes even if it wasn’t for the peak performance [1.1.5.2] [HC] The Immortal Army - Pet Dervish - Beginner Friendly Pet build! Super fast MC farmer!
*stuff is a bit changed these days as patches altered some items (conduit converts to fire now instead of +1 summon, so doens’t work the same on acid version)
other stuff can be pyran/blightlord shieldbreaker, cyclone elementalist, light’s defender elementalist
various piecemeal options for custom immortal pet memes, bleed pet dervish blood knight also doable