Big orchestral sound in pop, rock etc.

Thanks so much for the suggestions so far! I´ll definitely have a listen.

Thanks everyone for the suggestions. That´s plenty to explore, I´ll be quite busy in the next couple of days.

Today I listened to Chicago V (I´m going through the discography) and maybe it´s a bit too jazzy for my taste but the overall sound of the band is very pleasing. Rock with horns. Nice.

Frankie Goes To Hollywood´s „Welcome to the Pleasuredome) was the second album I ever bought. It still holds up, even though I don´t listen to it that often. The second album has some great songs and production, even though it´s a bit less over the top.

Early Pet Shop Boys is right down my alley, even though I didn´t think of them. But hey, „It´s a sin“ is big. One song I love to return to every now and then is the long version of „It´s alright“. Recommended!

I´m very much into early Genesis and Yes, I love the sound of the B3 and Mellotron and it always presented a hurdle when bands started using other synths. I know few of the other bands @simonmoon recommends (thanks!) and will check them out. I can already return the favour and recommend Magma´s „Mekanik Destruktiv Kommandöh“: On the one hand it´s really out there on the other it´s so rhythmic and rocking, a bit of a take it or leave it thing. I love it.

I had not heard at all of the Carpenters album. And maybe I would have dismissed it as a cash grab and lazy, but now I´m intrigued. Thanks!

Santana´s first is great, even though I like the Woodstock performance better (it´s included in the legacy edition 2CD set). Late 60s and early 70s salsa albums have a lot of players on them: „Fania All Stars Live at the Cheetah“ is a good example.

Joni Mitchell – „Miles of Aisles“ – that is also a nice album.

Thanks again everyone!

@bdp24 We´re entering neo-classical terrain here – that´s not exactly what I meant in the original post, but still: I´m listening to this right now and it has beautiful moments.
To be honest, the arrangement of „River Deep, Mountain High" is a bit too much for me, distracting from the song.
I´ll check out the other albums you recommend though, Nitzsche surely know how to handle an orchestra.
One more adventurous release I can recommend is „Ys“ by Joanna Newsom. It´s all harp and singing plus a full orchestra (arranged by Van Dyke Parks). She´s really taking folk into new directions there.

@pops Thank you! Maybe this will finally get me into Elton John. Before I heard „Mad Dogs and Englishmen“ I wouldn´t have touched Joe Cocker records with a stick, but I´m glad I gave it a try.