While Samuel Morse is widely credited with inventing the electrical telegraph and developing Morse Code, it wasn't a single person who perfected it. The development of the telegraph was a collaborative effort with contributions from many individuals over several decades.

Here are some key figures who played significant roles in perfecting the electrical telegraph:

* Sir Charles Wheatstone: A British scientist who made significant contributions to the development of the telegraph, including the development of a practical system for sending messages.

* Sir William Cooke: Collaborated with Wheatstone in developing the first commercially successful telegraph system in Britain.

* Alfred Vail: Collaborated with Samuel Morse in the development of Morse Code and built the first practical telegraph apparatus.

* Edward Davy: Developed the first practical submarine telegraph cable.

* Werner Siemens: Developed a highly successful telegraph system using an improved form of the Wheatstone bridge.

The perfection of the telegraph involved advancements in:

* Signal transmission: Developing more efficient ways to send electrical signals over long distances.

* Code development: Creating a standardized system for representing letters and numbers with electrical pulses, like Morse Code.

* Apparatus design: Building reliable and user-friendly telegraph equipment.

* Network infrastructure: Establishing telegraph lines across vast distances.

So, while Samuel Morse is celebrated for his invention, the electrical telegraph's perfection was a culmination of efforts by many brilliant minds.