How to express "nice to hear from you" on telephone call in business situation?
"Thank you for calling" seems to fill the bill.
Most of your suggested phrases carry some baggage. Of those, "Pleased" comes closest to neutral, IMO, but I'd suggest "Good to hear from you" as an even more neutral choice.
Hello, [name]. I'm happy/pleased to hear from you.
This is cordial and appropriately formal.