The Garlon/Spritze db is the neutralized db that is in the game so it is kinda pointless to use that one.
None of the modded db's work with the neutralized db that is in the game so don't use that option when setting up your game. If Gambos db is neutered already you don't need to use that option for it anyway. The Spritze db is only semi-neutered, all the minor league and negro league and japanese records are neutered to match that years major league results and for player age and competition level but the major league is left unchanged.
Modded db's also are not compiled so importing complete history is not advised. Since you are starting in the 1800's this will not apply to you.
I am not sure you can start earlier than 1871 in OOTPx so your 1861 attempt may be problematical.
I have used all the db's other than the Gambo one (just because it is too similar to mine, just not as cool

). There is a Japanese db by the Murmurer and Cooperstown and Negro league templates by Cooperstown. They all seem pretty good to me.