
Solver
Person or Device
Can refer to both a person with problem-solving skills or a device made to resolve issues.
My calculator is a great math solver.
Positive Connotation
Using 'solver' usually suggests competence and the ability to overcome challenges.
She's known as the office solver for IT issues.
Active Role
Implies taking an active role in finding a solution, not just participating in the process.
He became the chief solver during the negotiations.