Yeah, good idea, because tastes shift in time and of course discovering new band or artists give you new current priorities. For example I'll always say, no matter the circumstances, that Iron Maiden is my favorite band, but when I discovered Savatage they were all I was listening and definitively in that moment I was way more interested in hearing Savatage than Iron Maiden.
So, with this premise in mind, I'd say...
1) Bruce Springsteen. Hands down, the discovery of my summer and my top priority right now when it comes to his vast catalogue. Why it took me so long to pay attention to him?
2) Dropkick Murphys. Another band whose full catalogue I discovered thanks to working from home (and therefore having each day 8 hours to listen to music) and that I listen basically weekly, save just the first 2-3 albums.
3) Nightwish. This placement is basically carried almost alone by their latest album, I'm listening the living shit out of it since its April release and I still haven't got tired of it yet.
4) Blood Ceremony. Not such a recent discovery, but their captivating mix of doom, occult rock and flutes will come sooo handy now that we're going into darker and colder days.
5) Ensiferum. Once again a single album, the latest one (Thalassic) sparkled back my interest in this folk metal band from Finland and it's another daily listen for me.
So basically some artists "win" just on the heels of their latest album, but definitively my most favorite artists right now are the ones I placed at the top, Bruce Springsteen and Dropkick Murphys. Iron Maiden is still my favorite band though, an honorary title they will never lose