Strength Build Paladin Multiclass

[PaulImposteur]

Hey guys, my character Rasheeq is a really fun character and just hit level 15.
He's a Paladin (Cavalier), with a focus on improved knockdown, and all the charge feats. He uses improved power attack and northerner hewing to up his damage a lot.

His base stats are such
STR 21 (plan to max)
DEX 10 (Item to compensate)
CON 11 (Buff)
INT 13
WIS 14 (Ring for spells)
CHA 8 (Dumped, non EDM build as Cavalier)

Any multiclass recommendations? I was thinking of just going straight Paladin, but I don't have many levels left to play with. So now is a good time to looking into alternatives.

I'm not too great at finding synergies though, so any help would be greatly appreciated!

[Deathgrowl]

Go pure. That gives you most epic feats, meaning you can get like 32 base strength. With paladin buffs, that's 40 strength. Going to be hard to resist that knockdown!

[PaulImposteur]

That's what I figured! Just wanted to make sure. Thanks!

[Valefort]

You can also add a pinch of MaA (5) if that suits your taste and build, that'll net you access to tumble, heavy armor optimization, shield block +1 and a bit more will save for the cost of practiced spellcaster feat and 1 epic feat (but you get a bonus feat at MaA 5).

[Sun Wukong]

Four levels of Fighter and a feat spent on Practised Spellcaster? You get free towershields, and potentially 3 fighter bonus feats spent on whatever your character might be missing. It might bring multiclassing experience penalty though.

[Kiran]

26 paladin, 4 annointed.

Get tower, blindsight, toughness, tumble and spellcraft. Also gives will save + 1 elemental damage