Soloing Old content

So far i've tried all 4 vanilla raids and have some issues in completing it. (i am 4.6k prot pala)

Molten core -
Lucifron - Killed it (Seal of light active at all times)
Magmadar - Killed it (Spammed heals and divine shield)
Gehennas - Killed it
Garr - Killed it (this guy got a dispel need to reactivate righteous fury and sanctuary buff)
Shazzrah - Killed it (no issues)
Baron Geddon - Killed it (can't get it to drop the bindings, Unlucky me)
Golemagg the Incinerator - Killed it (Used divine shield to remove debuffs)
Sulfuron Harbinger - Killed it(Long fight - 50+ mins)
Majordomo Executus - (Easiest boss)
Ragnaros - (Any Tips for this one?)

Ruins of Ahn'Qiraji -

3 bosses killed. Kurinaxx, Moam, Ossirah the unscarred.
Buru the Gorger - Getting Massive DOTS
Ayamiss the Hunter - Can't reach and can't kill it on Holy Pala(spec)

Temple of Ahn'Qiraji -

The Prophet Skeram -Can't Solo First boss (Getting Charmed,Can skip though)
Three Bugs - Got lost and i couldn't find them
Battleguard Sartura - Killed it.
Fankriss the Unyielding - Died many times.
Viscidus - Didn't get to see this guy.
Princess Huhuran - Died due to Dots.
Twin Emperors - Didn't get to them
Ouro - Didn't get to them
C'Thun - Didn't get to them

BWL - Can't Get pass first boss.
Zulgurub - Haven't tried

Any good tips?

Obvious/Sarcastic tips: Get better gear. Get friends so you don't even have to solo.

Actual help: Potions/Consumables that remove debuffs or allow you to interrupt crucial spells like mobs healing the themselves will help a lot. Restorative Potion will remove many types of debuff (including curses which you normally can't dispell as a paladin). There are some strange items that also let you interrupt casts, I believe there are some from engineering but there is definitely one from a boss in Stratholme (vanilla dungeon) that has 3 charges you can use to interrupt adds.

For soloing Ragnaros as a paladin you'll want to use fire resistance aura and pop aura mastery as a defensive cd when he flings you back and starts spamming fire blasts. Run back into melee range immediately assuming you can make it without dying and use judgement of light and seal of light to heal up. Refreshing the total duration of your sacred shield should remove its internal cd allowing it to continually shield you. All that's really mana-intensive though.

I don't feel like taking the time to write more so have fun with that.