Several bikes with Campy Ergos and Canti brakes - Avid Shorty 6, Shorty Ultimate, and cheaper Tektro ? Onyx on my tourer. All work fine. After my first cross bike build many years ago in which the only way to stop my bike was high speed dismounts, I learned to use inline adjusters like Jagwires.
As far as tires for road and gravel, I like Gravel Kings, Challenge Strada Bianca (vulcanized 160 tpi version) measures at 35 mm and Challenge Paris Roubaix (vulcanized) measures at 28-29. All of those can be found on sale pretty regularly in the $30 range.
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N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '82 Colnago Super, '95 Gios Compact Pro, '95 Carrera Zeus, '84 Basso Gap, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, '84 Paletti Super Prestige, Heron Randonneur