Kay

Mark,
Quoting Grudem himself in the RBMW Appendix:
“In fact, the most common word for ruler, the one that literally meant ruler, was archon. It is not at all surprising that in contexts where the Hebrew word for head meant ruler, it was frequently translated by archon.”
Why do you want to place authority in these passages? It goes against Jesus’ teaching about being servants to one another rather than seeking authority over one another.
“But it is not this way with you, but the one who is the greatest among you must become like the youngest, and the leader like the servant.” (Luke 22:26)
“He called the twelve and said to them, “If anyone wants to be first, he shall be last of all and servant of all.” (Mark 9:35)
The two conditions of true greatness are humility and service – not authority and service.
In fact, Jesus words, no matter which gospel account one reads, are never telling any believer to take authority of any kind over another believer – just the opposite – He warns against it.