ElMonoEstupendo

Yes!

Not Patji, but you're thinking the right way.

Not Ashertmarn. Not Cultivation. Not Mraize. Not Sixth of the Dusk. Not Tonk Fah. Not Rysn. Not Balat. This character keeps a pet/pets. This character has a bond, but we don't know with what. This character is always surrounded by people. This character is never seen to speak, but must have some means of communicating.

Not Cultivation.

Not Mraize. Not Sixth of the Dusk. Not Tonk Fah. Not Rysn. Not Balat. This character keeps a pet/pets. This character has a bond, but we don't know with what. This character is always surrounded by people.

Not my man Sixth.

Not Tonk Fah (keeping might be a stretch...)/ Not Rysn. Not Balat. This character keeps a pet/pets. This character has a bond, but we don't know with what.

Not Balat.

Nice clues! This character keeps a pet/pets.

Nergaoul.

Mercystar.

Blended.

Oathbringer! Bit cheeky, I know.

Not Phendorana. Not Rayse. Not Wayne. Not Hoid. This character has been rejected many times. This character has at least two names, but we only know one. This character has had several bonds. This character shares the name we know with at least two books.

Dawnshards are supposed to massively increase one's facility with Investiture, which is one of the reasons Nikli insisted Rysn never bond a spren. Dalinar seems to regularly do things that the Stormfather (and others) think impossible. Sando has some plausible deniability with the Stormfather being somewhat unreliable in his knowledge, but he also surprises Rayse and Nale (and perhaps others?). Not to mention he hears the actual UNITE THEM command. Dalinar having the Unite Dawnshard makes a lot of sense, but these could also just be strong Connection to Honor. Part of the trouble with a Unite Dawnshard is that it doesn't really fit the brief. How could you kill God with such a command? Is uniting really one of the four primal thing all things can be brought to life with? CHANGE makes a ton sense in both questions, but UNITE?

A few possibilities: Nergaoul was sunk into the ocean, right? But I suppose there's no reason to expect it to interact with lifespren like this. We don't know where Ba-Ado-Mishram ended up yet... They're responding to a vast, coordinated lifeform. Perhaps a Sleepless? Rippling waves in a beat implies a lot of Investiture and a point of origin. This reminds me of highstorms and the Everstorm - is there an equivalent for Cultivation, underwater?

Not Rayse. Not Wayne. Not Hoid. This character has been rejected many times. This character has at least two names, but we only know one. This character has had several bonds.

Not Wayne. Not Hoid. This character has been rejected many times. This character has at least two names, but we only know one.

The pun was too juicy. This character has been rejected many times.

Timbre.

I'm sure Silence has been nice at some point, but she's my next guess.

Patji.

The Stormfather, am I right?

Maya.

Kaladin Stormblessed, although his shins might disagree.