Modern and corporate branding package

We are looking for a talented graphic designer to design the following items as part of a comprehensive branding package:

Letterhead
Presentation Template (12 slides, 16:9)
Business Card (double-sided)
Simple colour palette

The design should be clean, modern, minimalistic, corporate, but approachable.
We work with multi-million turnover clients, and want our branding to convey trustworthiness and authority.
For the aesthetic we are aiming for, please see the attached reference files. These are purely initial ideas we had.

We do have existing fonts we use, but are open to suggestions on new ones.
We will need the final files to be submitted in an editable format.

Attached is also our logo. If you feel this could be updated with a new font or colours, we would be keen to hear your input.

The budget is indicative - please submit your best proposal for the project, lower or higher. We will consider all proposals submitted.

Follow up work is likely to be available as our new team engages with more clients and we need more bespoke presentations.

We look forward to working with you.