1. He was not happy at all regardless of his wealth.(regardless of)

1. （1） he was wealthy, he was not happy at all. (despite the fact that)
3. （2） money he had, he was not happy at all. (no matter 从句)
5. （3） , he was not happy at all. (as / though 引导倒装句）
7. （4） , he was not happy at all. (however 引导倒装句）