I haven't seen A Star Is Born, but I've heard/read from a lot of people that while she's better than expected, the only time they actually found Gaga truly impressive is the times when she was performing, and other than that, her acting was 'okay'.
I saw Bohemian Rhapsody and I absolutely loved it. They did take a lot of liberties with the story (though not knowing all of Queen's history, I hadn't known just how much was adapted), but IMO it was still absolutely brilliant. And Rami Malek was superb, as were the rest of the guys in the band (I still can't get over how much Gwilym Lee looked like Brian May). Though many liberties were taken, they were extremely meticulous about so many things -
this side-by-side of Queen's performance at Live Aid and the performance from the movie is great.
As for Bradley Cooper, he'll always be Will Tippin from Alias to me, but I find him very 'smarmy' and he's campaigning extremely hard by not campaigning (if that makes sense). He very very clearly wants the Oscar, but he's trying to appear humble by not being in peoples faces about how much he wants it, though everyone knows how badly he does. It's an interesting tactic...
And as for Amy Adams, she's already at DiCaprio levels. She's been nominated 5 times already (it will be 6 if nominated this year), all for acting. DiCaprio was nominated 6 times, though 'only' 5 were for acting (one was for producing Wolf of Wall Street).