By now, pretty much everyone knows about MGMT. I know this all too well because I couldn't get tickets to their show. But far fewer people seem to know about their earlier stuff, some of it released under their former name, The Management.
While these EP's are not exactly comparable to Oracular Spectacular, they are worth checking out. There's a 14 minute song called Metanoia that is pretty epic. Plus heaps of less polished songs from before they hit the big time.