Engineers with a lot of resources tend to be my favorite villains. Anyone who genuinely, earnestly believes they're going to solve a big problem and has just become laser focused on that to the exclusion of all else: that's a touchpoint I can relate to for a sympathetic villain.
For that I just have to think back to every new-CTO lead replatforming effort at any previous job. Ok, they weren’t evil, but the outcome was the same.