My Top 100 Animation Studios as of 2015

(1). Disney (W. Disney and Nine Old Men are more important than my nationality)
(2). Pixar (John Lasseter saved my life)
(3). Fleischer Studios (RIP)
(4). UPA (RIP)
(5). Toei Animation (Toei Doga is much better though)
(6). Mushi Production (but only 60s and 70s)
(7). MGM (most notably early Hanna-Barbera's "Tom and Jerry" series)
(8). Warner Bros (Chuck Jones' works cannot be ignored)
(9). Studio Ghibli
(10). Tokyo Movie (TMS is ok)
(11). old-Tatsunoko (current Tatsunoko absolutely sucks ass)
(12). DreamWorks
(13). Blue Sky Studios (one of my fav studios lately)
(14). Sony Pictures Animation
(15). Studio Chizu
(16). Cartoon Network (The Powerpuff Girls is just outstanding)
(17). Ludorum plc (Chuggington is worth to watch, it's my guilty pleasure)
...

(50). GAINAX (basically I admit their independence)
(51). Madhouse
(52). Sunrise
(53). TMS
(54). Kyoto Animation (K-on is pretty nice but the others)
(55). TRIGGER Inc.
(56). A-1 Pictures
...

(92). Studio 4C (although almost dying)
(93). Production I.G (kusoreal)
(94). JC Stuff
(95). XEBEC (should know japorn isn't animation)
(96). GONZO
(97). ufotable (just a phony)
(98). SHAFT (the worst nightmare of our time)
(99). Current Tatsunoko (eww, go away)
(100). BONES, Inc. (even Jesus hates BONES)