Keep the badge template you already print from. Paste the attendee list straight out of Excel, tidy it in place, and take back a Word file or a print ready PDF with every sheet filled.
A Word file laid out as a sheet of badges with merge fields in it, like «First» «Last» «Company». The artwork, fonts and badge size stay exactly as they are. No design for this one? Use blank badges.
Copy the columns out of Excel and paste. Company and name in either order, or separate first and last name columns. After the check you can edit any cell, and the paste box and the preview follow along.
Every badge on the sheet gets filled, then a new sheet starts. Leftover slots on the last sheet are left blank.