In my research, I came up with all but one of the original captains --

Co. A—Phillips county—Capt. Pleasant G. Roper.
Co. B—Hot Spring county—Capt. John B. Torbett.
Co. C—Phillips county—Capt. James Washington Scaife.
Co. D—Saline county—Capt. Walton Watkins.
Co. E—Monroe county—Capt. William J. F. Jones.
Co. F—Yell county—Capt. Felix B.Strayhorn.
Co. G—Perry county—Capt. James H. Boring.
Co. H—Phillips county—Capt. ??
Co. I—Monroe county—Capt. George Washington.
Co. K—Yell county—Capt. George Harrod.
Co. L—Greene county—Capt. Joel C. Anderson.

The original Co. H was mustered into service by Maj. Cadwalader Polk.

Subsequently, as you and Danny have well documented, some of the original companies were consolidated and companies from disbanded commands were added.