I have managed to put together much of the information that you mention in your post. Still can't tie Moses to other Hexters, but Hesse-Cassel is in the general vicinity that many came from.
Moses HEXTER
b. ca 1825, Hesse-Cassel
& Mary
b. ca 1825, Maine
| Benjamin Moses HEXTER
| b. 1850, Bangor, ME
| d. bef 1880?
| & Lena JOHNSTON
| m. 1873, Bangor, ME
| | Levi Benjamin "Benjamin Louis" HEXTER*
| | b. ca 1873
| | d. Dec 1902
| | bur. Mt. Pleasant Catholic Cemetery, Bangor, ME
| | & Grace PARK
| | d. 1903
| | m. 1890, Bangor, ME
| | | Louis HEXTER
| | | b. ca 1895, Bangor, ME
| | Levi Benjamin "Benjamin Louis" HEXTER*
| | b. ca 1873
| | d. Dec 1902
| | bur. Mt. Pleasant Catholic Cemetery, Bangor, ME
| | & Mary Josephine SULLIVAN
| | m. 1899
| | | Mary Regina HEXTER
| | | b. 1903, Bangor, ME
| | | & CRATTY
| | | | Constance CRATTY
| | | | & KLEMME
| Sadie S HEXTER
| b. 1855
| & Samuel WILER
| b. ca 1847
| m. 3 May 1872, Bangor, ME
| div.
| Regina W "Genie" HEXTER
| b. 1856
| & Llewellyn L MURCH
| b. ca 1847, ME
| m. 12 Oct 1886, Bangor, ME
| Martha "Mattie" HEXTER
| b. 1858
| & Melvin M MURCH
| b. ca 1857, ME
| m. 31 Jan 1884, Bangor, ME