Harrison Perkins talks about four negative qualities that disqualify a man from serving as an elder.
1 Tim 3:3 says Elders are

• Not given to wine
• Not a violent man, But gentle
• Not quarrelsome
• Not covetous (loving money)

The Murray Smith article, “An Overseer must be…Able to Teach” (1 Tim 3:2): ΔΙΔΑΚΤΙΚΟΣ as the Center of the Character Chiasm in 1 Timothy 3:1–7”
JETS 69.2 (2026): 301–320, is available here.

Harrison's Book Recommendations:

1. Louis Berkhof, Systematic Theology, Banner of Truth, Expanded Edition, 2021. (First published in 1934)
2. Harry L Reeder III, The Leadership Dynamic: A Biblical Model for Raising Effective Leaders, Crossway, 2008. Or, 3D Leadership: Defining, Developing and Deploying Christian Leaders Who Can Change the World, Christian Focus, 2018.
3. Jonathan Landry Cruse, Church Membership (Blessings of the Faith), P&R, 2024.