Thomas Sowell and Roger Scruton are pretty okay IMO. They make sense even if you don't fully agree. I am tempted to include David Frumm, who is an anti-Trump neoconservative, but he was an adviser to Bush Jr administration and therefore complicit to the invasion of Iraq and financial crisis, so I can't give him more respect as I would have liked.

But overall this is my point exactly if none of you can think of respectable enough conservatives. The intelligent ones are buried by the more deranged pseudointellectual right wingers because the latter are deliberately given more voice by vested interests to intentionally dumb down people.