Man.... I haven't seen this one touched yet, but i also don't live on this website lol.
If I recall correctly, Bondsmith candidates historically have been (predominantly):
Rlain, Navani, Taravangian
All three are now off the table.
I don't think Brandon would make a rando into a bondsmith... seems too "out there".
The bondsmith presumably has to be someone of some notoriety.
Let the critiques commence, my prediction is yet another Kholin: Adolin. Maya aside, we don't really know what that bond entails or if it eliminates a current spren bond... even if she's half revived. "I will unite instead of divide" ..... the entire trial scene in ROW and presumably the humans and honor spren in book 5?? Uniting all spren and stripping the ash spren of their gripes about human betrayal, possibly turning the skybreakers as well? I think Adolin and Maya just singlehandedly united the Shadesmar scene by exposing the truth.
What about Dalinar possibly dying? Who would take his bond?
I'm sure there's another character out there who will snatch up the nightwatcher but I hope it's not a fused or something. It could always be someone like Sebarial lol.
In the event Dalinar sies, I think we have a candidate for a triple-hatted bondsmith and/or shardholder: Kaladin. His eyes were glowing red after Teft and hes the son of tanavast, no clue on how he's connected to cultivation yet but i'm sure there's something. After all, who was Tanavast into??? Despite a WOB saying Lirin and Hesina are his biological parents, it may be that they physically had him but his soul was injected into that body via an honor/cultivation love scene or something.
All this to say: Kaladin is gonna be the eventual bondsmith or shardholder for all three, but the 25 meter target, in my opinion, is Adolin.