I've tried many goalkeepers before Alisson (OTW 88) like:
-Neuer (Base and CL) / (Base) rushed out like crazy and kept trying to save all of them with his legs (I hated that) / (CL) Did not do this, but was so much worse than (Base) everywhere else!
-Ederson / Too short to save headers (corners were easy goals).
-(SIF) Szczesny / Played amazingly at first, but then turned into bad Neuer...was so frustrating!!!
-Courtois / Was terrible Post-Patch.
-Fahrmann (Base and RTTF) / Great saves but Neuer was way better.
-Ter Stegen / Similar to Neuer--without the distribution.
-Navas / Too short to save headers...
PS: Never tried De Gea because of bad links--but I've played against him so much! :P
I can honestly say that Alisson (OTW 88) is one of the best goalkeepers in the game...I've heard De Gea is number one--and it seems like it... but for Hybrid-Squads (like mine) I'd rather go for strong links!
-Strong link to Virgil Van Dijk (CB) or David Luiz (FB).
-Great saves and reflexes!
-Always in the right position to save shots.
-Doesn't easily get beaten in headers.
-Distribution is better than most goalkeepers.
-Doesn't dive feet first to give the opponent easy goals even my grandma can score (like Neuer) +++
*Live Items Upgrade*
-Doesn't have Neuer-like distribution.
-All goalkeepers are beaten by good 1st time long shots--even De Gea (nothing you can really do there) *1st-time shots are broken*