A deity with attributes; fails on properties ("why loving rather than cruel?" is the fine-structure question again)
Platonic forms; fail productive capacity (the number seven does not do anything)
The quantum vacuum; fails transcendence (a state of quantised fields; calling it "nothing" is a sleight of hand)
The multiverse; more of the thing to be explained is not an explanation of it
Emergence; presupposes parts, relations and laws, exactly what needs grounding
A necessary being; maximal properties resume the regress (right about the termination, wrong to give it a character)
Brute fact; always available, never informs; the one move that guarantees no progress