Everything is personal opinion, obviously! As Disney doesn't really classify anything as "A through E" ticket attractions officially anymore. This is all your own opinion-based! 
Here's mine..
MK
E-TICKETS
Big Thunder Mountain Railroad
Splash Mountain
Space Mountain
Seven Dwarfs Mine Train
D-TICKETS
The Haunted Mansion
Mickey's Philharmagic
Monsters, Inc. Laugh Floor
Pirates of the Caribbean
C-TICKETS
Buzz Lightyear's SpaceRanger Spin
Enchanted Tales with Belle
The Hall of Presidents
It's a Small World
Jungle Cruise
The Many Adventures of Winnie the Pooh
Peter Pan's Flight
Under the Sea - Journey of the Little Mermaid
B-TICKETS
Astro Orbiter
Dumbo the Flying Elephant
Country Bear Jamboree
Mad Tea Party
Tomorrowland Speedway
TTA PeopleMover
Carousel of Progress
Enchanted Tiki Room
A-TICKETS
The Barnstormer
The Magic Carpets of Aladdin
Main Street Vehicles
Tom Sawyer Island
Prince Charming Regal Carrousel
Swiss Family Treehouse
Walt Disney World Railroad
Liberty Square Riverboat
EPCOT
E-TICKETS
Frozen Ever After
Soarin' Around the World
Test Track
D-TICKETS
The American Adventure
Mission: Space
Spaceship Earth
C-TICKETS
Living with the Land
O' Canada
Reflections of China
Turtle Talk with Crush
B-TICKETS
Gran Fiesta Tour Starring the 3 Caballeros
Impressions de France
Journey Into Imagination with Figment
The Seas with Nemo & Friends
A-TICKETS
Disney & Pixar Short Film Festival
ImageWorks
Innoventions
HS
E-TICKETS
Rock 'n' Roller Coaster
Toy Story Mania
Tower of Terror
D-TICKETS
Star Tours - The Adventures Continue
Beauty and the Beast - Live on Stage
Indiana Jones Epic Stunt Spectacular
C-TICKETS
Muppet*Vision 3D
For the First Time in Forever: A Frozen Singalong Celebration
Voyage of the Little Mermaid
B-TICKETS
Walt Disney Presents
Disney Jr. - Live on Stage
A-TICKETS
Star Wars Launch Bay
Star Wars: Path of the Jedi
AK
E-TICKETS
Avatar Flight of Passage
Expedition Everest
Kilimanjaro Safaris
D-TICKETS
Festival of the Lion King
Finding Nemo - The Musical
DINOSAUR
C-TICKETS
It's Tough to be a Bug!
Kali River Rapids
Primeval Whirl
B-TICKETS
Na'vi River Journey (For what it's actually worth.)
TriceraTop Spin
A-TICKETS
Rafiki's Planet Watch/Wildlife Express Train
The Boneyard
Trails
Here's mine..MK
E-TICKETS
Big Thunder Mountain Railroad
Splash Mountain
Space Mountain
Seven Dwarfs Mine Train
D-TICKETS
The Haunted Mansion
Mickey's Philharmagic
Monsters, Inc. Laugh Floor
Pirates of the Caribbean
C-TICKETS
Buzz Lightyear's SpaceRanger Spin
Enchanted Tales with Belle
The Hall of Presidents
It's a Small World
Jungle Cruise
The Many Adventures of Winnie the Pooh
Peter Pan's Flight
Under the Sea - Journey of the Little Mermaid
B-TICKETS
Astro Orbiter
Dumbo the Flying Elephant
Country Bear Jamboree
Mad Tea Party
Tomorrowland Speedway
TTA PeopleMover
Carousel of Progress
Enchanted Tiki Room
A-TICKETS
The Barnstormer
The Magic Carpets of Aladdin
Main Street Vehicles
Tom Sawyer Island
Prince Charming Regal Carrousel
Swiss Family Treehouse
Walt Disney World Railroad
Liberty Square Riverboat
EPCOT
E-TICKETS
Frozen Ever After
Soarin' Around the World
Test Track
D-TICKETS
The American Adventure
Mission: Space
Spaceship Earth
C-TICKETS
Living with the Land
O' Canada
Reflections of China
Turtle Talk with Crush
B-TICKETS
Gran Fiesta Tour Starring the 3 Caballeros
Impressions de France
Journey Into Imagination with Figment
The Seas with Nemo & Friends
A-TICKETS
Disney & Pixar Short Film Festival
ImageWorks
Innoventions
HS
E-TICKETS
Rock 'n' Roller Coaster
Toy Story Mania
Tower of Terror
D-TICKETS
Star Tours - The Adventures Continue
Beauty and the Beast - Live on Stage
Indiana Jones Epic Stunt Spectacular
C-TICKETS
Muppet*Vision 3D
For the First Time in Forever: A Frozen Singalong Celebration
Voyage of the Little Mermaid
B-TICKETS
Walt Disney Presents
Disney Jr. - Live on Stage
A-TICKETS
Star Wars Launch Bay
Star Wars: Path of the Jedi
AK
E-TICKETS
Avatar Flight of Passage
Expedition Everest
Kilimanjaro Safaris
D-TICKETS
Festival of the Lion King
Finding Nemo - The Musical
DINOSAUR
C-TICKETS
It's Tough to be a Bug!
Kali River Rapids
Primeval Whirl
B-TICKETS
Na'vi River Journey (For what it's actually worth.)
TriceraTop Spin
A-TICKETS
Rafiki's Planet Watch/Wildlife Express Train
The Boneyard
Trails