Since my original post in 2006, I have found most of the info in your post. There are a few discrepancies:

I have his 2nd marriage to Mollie Horrell, 14 Dec 1892--close!

George W.'s father was Richard Thomas Tuck, not William Tuck. Ida Tuck, informant for George's death certificate was mistaken. Confirmation of relationship to Richard Thomas is the following obituary for P. P. Tuck, Paul Powell Tuck, another known son of Richard Thomas Tuck. Paul died in Holcomb Village, Dunklin Co, MO:

"P. P. Tuck Dead. Geo. W. Tuck received a message from Manley last Friday morning informing him that his eldest brother, P. P. Tuck, had just died quite suddently. Mr. Tuck was 65 years old or would have been on the 15th. He was born in Kentucky but has been a citizen of this county for the last 26 years. He leaves a wife and 10 children, three brothers and a host of friends to mourn his loss. Funeral services were held and the body buried at Pine City Cemetery Saturday. (Campbell Citizen Obit)