I love Cornwell books, and I'm actually fine with him being "biased". Simply because all those novels I've read that were told from a British point of view were actually like that. It's always about how good and strong the British are, for example compared to the French. I actually enjoy that.
I'm currently on Sharpe's third book. First two were amazing already.
I also recommend books like these:
Stewart Binns: "Conquest"
Jack Hight: "Siege"
Harry Sidebottom: "Warrior of Rome"
Bernard Cornwell: "Azincourt"
Bernard Cornwell: "The Grail Quest" (4 Parts)
Wilbur Smith: "The Quest" part of the Egyptian Novels (there are many parts), I've only read them on German tho, but I've read another book on English of him which was great tho.
Wilbur Smith: "Monsoon" part of "The Courtneys" books
Noah Gordon: "The Medicus" actually any of his books are worth reading even if many of those aren't historcial though.