If you want to express that the tour guide was good at speaking, you could say:

"The tour guide was very articulate."
"The tour guide had excellent presentation skills."
"The tour guide was very eloquent."

Alternatively, you could simply say:

"The tour guide was a great speaker."

Remember to use appropriate verb tense when speaking or writing in Engpsh. If you are discussing a past event, you should use the past tense. For example: "The tour guide was a great speaker." If you are discussing a present event, you should use the present tense. For example: "The tour guide is a great speaker."