WELCOME Skippylou!
I have actually shot two 200+# boars in self defense... Both where shot in the head, between the eyes with a Remington 2 3/4" Slugger 12 ga. @ about 10 yards.
Believe it or not, shot with a 18" H&R single shot. Cooler heads prevail, I simply did what was needed.
I didn't move from the spot. I fired at the first, as he charged. I opened the gun, the shell ejected, I replaced it. All with out taking my eyes off the second pig. He spun and charged me, I put the front site on the head and squeezed a second time. Both pigs died, in a pile not 10' from where I stood.
Personally I would load that 1911 with a good SWC hard cast bullet. Chances are you carry it because you feel confident with hitting what you shoot at. I have taken a couple hogs with the 45 ACP, with good bullets from a careful shooter it can be a effective tool.
If you feel the need for a rifle, without knowing your preferance in actions. I will give you mine. A Marlin 1894 in 45 Colt (44 Mag just as good) Loaded with a heavy, WFN bullet hard cast for penetration. I like a 300G but a 250 would be just as good. Something else, the colt or mag will hold almost ten in the mag tube where a 30-30/ 35 rem only gets you 4-5 rounds.
Oh yea, forget about the amour "plating". These bullets will not "bounce" off the pig. Watch my video and see...
You mentioned rifle, so I did not think shot gun. BUT I agree with OneGunRed (WELCOME!!) and say that there is nothing better than a Pump 12Ga for a close range defensive firearm.