For a more custom look, use map-based text (pixel art) to create custom signs that look like part of the environment.
Use clear, bold text above portals or NPCs. Spawn / Lobby for Survival, Skyblock, SkyWars, ...
Use text to display "Top Voters," "Active Events," or "Server Rules" in a central hub area. For a more custom look, use map-based text
Create floating, multi-line text that is visible from all angles. You can find setup guides and downloads on SpigotMC. For a more custom look