Voiceover artist. male voice (American voice)

I need a voiceover artist. Long term business. in order to implement such videos. The artist will get the script. He will do the work and that's it. Please send your previous works samples

https://www.youtube.com/watch?v=uedGYyXxiCU
https://www.youtube.com/watch?v=U86NbUntvjQ