Anyone know some games similar to these?

The only ones I can think of that are kinda in that vein and aren't already in your list are:
World to the west
Wandersong
Rochard
Cave story+

Though all of those have a blend of funny with sometimes sad/heartfelt... however you do have undertale in there so I guess that part might not be too far off the mark. World to the west also isn't super platformy it's more rpg like the evoland games.

Hyper Light Drifter

Maybe Songs For A Hero? It has platforming and it has comedy (and it's a musical, btw).

I've played a few of them, but I can't really find a consistent theme between Undertale, Katana Zero, Supraland, and Underhero - aside from good games I like.

But if you like platformers with some humour, check out the Shantae series of games - they're all great.

umm... any of these look like your thing?
Adventure Pals
Flat Kingdom
Alwa's Awakening
Yoku's Island Express
Kero Blaster
Swords of Ditto
The Spiral Scouts

The Trine series might also be worth checking out...

I think these fit your requirements
A Hat in Time
BattleBlock Theater not bundled, but cheap on sale
Thomas Was Alone
ibb & obb
Moonlight
Guacamelee! Super Turbo Championship Edition
Cat Quest
Portal series not bundled, but cheap on sale
Epic Battle Fantasy 4 EBF 3 is free on Steam

Stanley Parable is closest thing to Jazzpunk I can think of.

Gato Roboto.
Super win the game, I think, but I don't remember well.
Also, if you're looking for fun, take a look at West of Loathing. It's not a platformer/metroidvania, and not bundled, but it's hilarious

Give https://store.steampowered.com/app/335670/LISA_The_Painful/ a shot maybe. Quirky and funny platformer.

Yume Nikki (similar to Undertale)
Owlboy (similar to Underhero, Horace etc)
Mo:astray (similar to Katana Zero, The Messenger etc)
Wonder Boy (again platformer similar to above)
Hollow Knight (similar to The Messenger, Katana Zero)

this is a nice list of games saving this for later :3 i guess we have similar taste
I just love metroidvania type of games :)

I'd add iconoclast to the list
while not funny but great games with great atmosphere: Ori and the blind forest, Child of light.

Dustforce
Vessel
The BIT.TRIP games

Manual Samuel, not a platformer but it has lots of stupid humor

KAMIKO and Fairune Collection are somewhat similar to Evoland 1 & 2.

As for the rest you're better off search for "Metroidvania" on Steam. My suggestions for this sub-genre would be Momodora, Shantae and Guacamelee series, both have a bit of comedy.

Also Piko Piko look a lot like Rabi Ribi.

EDIT: Oh, I read Piko Piko instead of Pikuniku, but it's also fitting this sub-genre.

My Friend Pedro is quite similar to Katana Zero. Slow mo action except with guns

I'm not 100% sure on the kind of game you're looking for, so here are a bunch of random bundled games that seem like they might be interesting to you:

Psychonauts
Gurumin: A Monstrous Adventure
Pizza Titan Ultra
Pool Panic
Toki
Rise & Shine
Lost Socks: Naughty Brothers
Octahedron: Transfixed Edition
Cursed Castilla (Maldita Castilla EX)
Freedom Planet
Freedom Fall
KO Mech
Cathedral
Alien Splatter Redux
Mini Ghost
Zombotron
Odallus: The Dark Call
BUTCHER
Forager
Eagle Island
Goo Saga - HD Edition
Pankapu
Inside My Radio
FEZ
INK

did you try yooka laylee ?,seraph ,stealth bastard ,

Undertale -> Light Apprentice

Similar games, some differencies.

Maybe EvilQuest? It's not a platformer though, more of a short Zelda clone.

Not the most amazing game ever but I thought Message Quest was a really cute & funny game. It's like a casual little point and click story that I'd pretty much recommend any day, even if it's not the platformer you're looking for.

I second Battleblock Theatre, for a humerous platformer. It's fun solo or coop.
Quantum Conundrum has some ongoing slapstick(?) sciency humour narration, is a puzzle platformer with physics manipulation.
Ittle Dew doesn't have a huge story or anything but is a fun adventure Zelda-like which definitely doesn't take itself too seriously. There's a sequel as well, but I've not played it.
This one's a shot in the dark but perhaps Unbox: Newbie's Adventure, for a goofy adventure platformer.
Off-Peak is f2p and has a similar vibe to Jazzpunk. They also made The Norwood Suite.

Check out Cloudpunk if you like a more chill atmospheric game with a focus on exploration and plot. Sorry if its not similar to the games you asked about but I thought I leave it here anyway :)

If you're still looking for more games to play, you might want to check out Songbringer! Steamgifts tells me it has been bundled recently but I'm not sure where to find it.