my eog wont let me quit benching either.......
i also injured a shoulder,,,,,, i cant do Incline barbell presses...... i substitute dumbells on the incline......
suggest, as you said, go back to basics.........
start light, adding 5-10lbs per workout........ 4-6 sets, working from 5-10 reps...... also might want to cheat a little...... if your not going to comps, cheating is great for adding poundage to your bench...... simply arch that back........ best way is to put feet on bench, then arch way up...... also get a good thick towel and lay on chest....... just a little help to get the poundage back up there....
move on to inclines...... 4 sets..... then to flyes and finally dips.......
pretty basic stuff..........
luckily my flat bench was not affected by my shoulder injury......