I have been trying make undeads work in singel player, would not call it consistent.

For loose streak start: 2 priest with panda is good, 3 humans is good to hard part is level 3 human since your offered few at start. Elves are most populace early tier thus most consistent. Mix of 2 synergies are typically easy to find aswell.

My best performing game were Knights trolls with a fatebend huskar as knight.