Yes, the Master's Holsters Cross-Draw OWB Holster will be compatible with your 1911. The 4" model is open ended and will allow your slide/barrel to poke slightly out of the end. You can also use the 5" model which will leave some excess room as the base of the holster.
The Master's Holsters Cross-Draw OWB Holster will most likely not work with either of those revolvers. The holsters at the link below will fit a Ruger SP101 and might also work for the Taurus 856.
https://www.opticsplanet.com/galco-combat-master-belt-holster-kegmg.html?_iv_parent-gun-model=ruger-sp101&_iv_gun-model=colt-agent,colt-cobra,colt-detective-special,kimber-k6s,ruger-sp101-2-dot-25in,ruger-sp101-3in-1,taurus-model-94-2in,taurus-model-605-2in
The Master's Holsters Cross-Draw OWB Holster for the Smith & Wesson J-Frame Revolver 2in should also be compatible with your LCR. MPN:7700BLK (Black), and MPN:7700BRN (Brown).
The Master's Holsters Cross-Draw OWB Holster will most likely not work with a 1911 with rail.
The holsters at the link below are left handed and will fit the Bersa Thunder 380.
https://www.opticsplanet.com/1791-gunleather-bhc-open-top-belt-holster-for-small-and-micro-frame-firearms.html?_iv_parent-gun-make=bersa&_iv_parent-gun-model=bersa-thunder-380&_iv_gun-make=1911-platform,bersa,glock,kahr-arms,kimber,ruger,sig-sauer-1,walther&_iv_gun-model=1911-3in-1,bersa-thunder-380,glock-42,glock-43,glock-43x,kahr-arms-cw45,kahr-arms-k9,kimber-micro-9-1,kimber-micro-380-1,kimber-ultra-carry,ruger-lc9,ruger-sr22,ruger-sr1911,sig-sauer-1911-ultra-nitron,sig-sauer-p238-1,sig-sauer-p365-1,walther-ppk&_iv_hand=left
Yes you can.
Possibly but it is not a guarantee.
Yes, the grips should not interfere with the holster.
Yes, the models for Colt 1911 with 5" barrels should fit.
No, it will not.