OK,
Lets see....
The tea cups might actually be fine for your 19 month old. If you don't spin them with the wheel they are actually pretty mild. No worse than the Lady Bug Boogie (for kids) in DCA
It can be tricky. And of course all kids are different.
For example my DD11 liked HM one day but the next visit we had to exit after we had already boarded our Doom Buggie. She was around 4 then.
If you child is scared of the dark I would skip Haunted Mansion, Snow White & Mr. Toad. Peter Pan is pretty dark as well as is Pinnochio.
Many of the rides your child may not like will have height limits so that will make things easier.
Concentrate in Fantasyland on -Dumbo, Casey Jr. Train, Carousel, Walk thru Sleeping Beauty's Castle, Storybook Land Canal Boats, It's a Small World, and maybe Alice in Wonderland.
Tomorrowland-Finding Nemo Submarines, Buzz, and Monorail.
New Orleans-Pirates (maybe too dark?)
Adventureland-Tarzan's Treehouse, Jungle Boat Cruise, Tiki Room
Frontierland-Mark Twain Steamboat and/or Columbia, Pirate's Lair (formerly Tom Sawyer's Island)
Main Street-Railroad, Double Decker Bus, Trolley, and a few other Main Street vehicles.
Critter Country-The Many Adventures of Winnie the Pooh.
In DCA
Bugs land/Flik's Fun Fair-Heimlich's Chew Chew Train, Flik's Flyers, Francis' Ladybug Boogie, and if it's warm/hot play in Princess Dot's Puddle Park(bring water shoes and change of clothes-kid's must wear shoes at all times)
Hollywood Pictures Backlot-Monsters Inc, Playhouse Disney Live, Animation Academy (Turtle Talk and just running around inside.)
Paradise Pier-Triton's Carousel, Golden Zephyr, Mickey's Fun Wheel-non swinging car
Grizzly Peak-Redwood Creek Challenge Trail
We took my Nephew2.5 yesterday for a short visit. He did Tiki Room, Mark Twain, and Pirate's Lair very much.