Welcome to holorobo's space!

Create a cyberpunk cityscape at night, with neon signs reflecting in puddles on the rain-slicked streets. Flying vehicles zip between towering skyscrapers, and holographic advertisements flicker in the air. Focus on the contrast between the bright lights and the dark, gritty alleyways.

You are a detective in a futuristic, noir-inspired city. You've been hired to find a missing person, but the only clue you have is a cryptic message left on a data chip. Describe the city, the client, and your initial investigation.

Write a function in Python that efficiently finds the kth largest element in an unsorted list of integers. Consider edge cases such as an empty list or k being larger than the list's length. Optimize for both time and space complexity.