Is this an indirect way to suggest that I do my own research vs getting into it?
No, I'm not too good at indirect

. I just don't know what is out there. I did a research project long ago and spent a week in Nashville reading articles and journals of J.R. Graves and R.B.C. Howell. I just do not know where to direct you and thought that may be of some use.
Some Baptists (like R.B.C. Howell) rejected Landmarkism not necessarily for it's principles but for it's extreme nature. Many of the points of landmarkism existed across the spectrum of Baptist faith, but not necessarily the position that Graves took in practice. Another illustration is Calvinism in the SBC. Early on the SBC was distinctly Calvinistic. But while they rejected Arminianism they also rejected Calvinism in the extreme positions (Howell also faced the error of people like Daniel Parker and the "anti-missions movement"). People can be wrong by holding a false doctrine. But people can also be wrong for holding a true doctrine falsely.
Here's a quote from R.B.C. Howell that may help illustrate what I am saying:
"When shall we have wisdom and piety enough to resist successfully these endless innovations? For ourselves, we protest that we are not Antinomian Baptist, nor Free Will Baptist, nor Old School Baptist, nor Campbellite Baptist, nor Landmark Baptist, but what we have ever been Baptists of the old apostolic stamp, taking the Bible as our exclusive guide, loving all who love Christ and ready always to do what we can to reclaim the erring and to save the lost. The treatment proper for Pedo-baptist preachers, may, as we believe, be safely left to the churches, where it of right belongs, and when, after all, it must be left under the guidance of the word and spirit of God. These churches may err on the side of a mistaken charity; they may precipitate themselves into a proscriptive bigotry, but a praying Christian hear will by the grace of God, eventually lead them safely out of all extremes" [quoted in Joe Burton,
The Road to Augusta (Nashville: Broadman Press, 1976), p. 163].