Mature{people who can handle it} readers only!!
i know a lot of these replies(no offense) are not that powerful, but i can assure you these are:
These are all either a combination of or only one of the following; powerful, depressing, well done, or great music.
1: DRAMATIC , GREAT MUSIC WELL DONE: the Moulin Rouge's El Tango De Roxanne
(VERY POWERFUL, mostly because of the music, and just listening to the music gives you goosebumps. saddest movie ive ever seen.[seen alot of movies] and i highly reccomend it to people who are mature enough to handle it {my friends are still mad at me for making them watch such a "weird" movie, lol})
2: DEPRESSING, POWERFUL, WELL DONE: SUPER SPOILER DONT READ IF YOU HAVENT SEEN law and order SVU SEASON 9 EPISODE 15 "undercover"
(okay lemme just say BEST SHOW EVER. this episode is so deep, mostly because the best tv, book, and movie character of all time Olivia Benson, [an undercover cop for the NYPD's Special Victims Unit aka. 'sex crimes'] goes undercover at a police station where fellow male officers are using the female prisoners for prostitution, and in the process of decoding this, gets thrown around and nearly raped by an officer in the basement. all through the next season all the detectives kno somethings up and olivia almost kills a guy and ends up being diagnosed [by a suspect] with Post Traumatic Stress Disorder. ONCE AGAIN WONDERFUL SHOW IT WILL KEEP YOU UP EVERY DAY WATCHING ALL 300 EPISODES IN 6 MONTHS {teehee...})
3:AMAZING MUSIC, WELL DONE, DRAMATIC, DEPRESSING: Phantom of the Opera: ending.
(Christine, the main character, has to choose between denying the violent and controlling phantom or denying him and killing her fiance. [crazy thing is, the actress who plays Christine is 16 {HOLY CRAP} and the phantom is 36.... SHE DOES NOT LOOK 16!!!])
4. DEPRESSING: Fruits Basket: Momiji's backstory: (okay well the adorable, sweet little boy[is the rabbit aka. my sign! in the zodiac] whos always happy and sweet{has an occasional fit and you think hes a girl at the beginning but is still adorable} tells the story about how his mother doesnt love him so chose to get brainwashed then to love him as her own. First off, this show is about this family of relatives who can turn into creatures of the chinese zodiac when hugged by members of the opposite sex, i think momiji is the cousin of the main characters Yuki and Kyo [cousins]who are fighting against each other for the MAIN character Tohru. okay anyway he basically said his mom had him and he was a rabbit when first born. his mother didn't know and she flipped out and was depressed and now she has no memory of having him. she knows Momiji as an employee's son at her husbands business, the place Tohru works as a maid. he cant be seen with his father as his son in front of his mom sad its REALLY SAD you have to see. best anime show ever. BUT MAY I WARN YOU the beginning isnt too appealing BUT IT GETS BETTER and please dont expect much from the disappointing finale...)
5. DEPRESSING,GREAT MUSIC, WELL DONE, DRAMATIC Moulin rouge end
(okay this took like 2 hours im gunna sum it up just please watch the movie so sad ending....)