In D&D 5e it appears that willing creature is defined by "consent"consent.
Zombies, skeletons, and golems all essentially have no will unless under control, but while they are under the control of a necromancersomeone, can they be willing creatures for the purposes of spells?
This would perhaps be better as an addendum to Can you make an unwilling creature willing? In other words, what defines “willing”?For example, but that question does not discusscould a necromancer bring along his zombie minions when using the undead, and neither do any answers to it.
note: For dominated creatures that could otherwise consent, this is complicated, and this question does not address that.teleport spell?