Unfortunately, it just doesn’t work that way. When there are five or six or more generally conservative candidates and two, or even only one GOPe candidate, the odds are huge against a conservative winning.
No runoffs, so the vote splitting among many conservatives is the final tally. And open primary states where Dims can play games with the GOP primary if there is not a competitive race among the Dims. And the blue states, even though there are many conservatives in blue states, they still likely go for the more moderate candidate in high enough numbers to give the win to the GOPe moderate.
Being tough won’t win it in such a primary setup. If conservatives don’t settle on a candidate very early, Jeb Bush will be the nominee.
I think there’s a good chance you are right. But coming together early on amongst genuine conservatives is about as likely as training 10 cats to parade in formation.