Logo + Corp. Design for Insurance Broker

Hi, for my brokerage business I want to have a meaningful and serious logo. In addition, of course, I am also looking for a suitable stationery design. I mainly work with private individuals and officials. Since not only insurances but also loans are conveyed, I imagined a logo/ lettering with a skyline. But I am open to all suggestions! I have found the appropriate skyline of Waltrop , however it is protected and should be changed slightly.

For the lettering this would be possible:
JG Versicherungsmakler
JG Finanz- & Versicherungsmakler
JG Vertrauensgarantie
JG Meine-Vertrauensgarantie
Vertrauensgarantie - mit der passenden Web Endung.

Font should be JURA.
Maybe you can incorporate JG in the logo somewhere?

Required: Letterhead with 2nd page
logo
business card on the back with a QR code, which then stores the contact
PowerPoint Template with follow-page
stamp
envelope
mail template

Since I'm not an expert in this field, there should be the following formats:
Word, PDF , Vector, gif, jpg, png

So that I can quickly change small things myself and for example can order envelopes at any time with the provided files. For questions, just let me know and we can find a common denominator!