IMO it depends on your style, which is of course not easy if you are just beginning. Throughout the years I found many books, audios or styles that are/were interesting, some off the top of my head:
60 years of challenge
Gary Brodsky (simple, straight forward)
DavidX (simple, straightforward)
Ross Jeffries (speed seduction, language patterns, NLP, ...)
Dr. Love (dating dictionary, more dating than seduction, some stuff outdated but really good base for relationships)
No-maam.blogspot.com (great simplified articles, older but very effective, one could even think that GC is based on this site)
Return of Kings (website, Red Pill, here and there good articles, rather for more mature and straightforward guys, little bit sloppy but good)
The above are IMO quite good, although it really depends on what you want. GC is more elaborated, more classy and nicer style, which of course requires much more work in comparison to e.g. G. Brodsky who is rather more simple/straightforward, perhaps of a true asshole type. Don't be mistaken by the simplicity though, it is very powerful, you just don't care about all the details. It seems that the above guys are also aiming for more mature audience whereas GC has lots of guys in teens/early 20's...
IMO there is still some pedestalization and idealization of girls/women on GC, but honestly I haven't found better/more elaborated stuff any other place. You simply can't go wrong with GC, great explanations, great attitude, great details... Chase, Franco and the other guys did amazing job.