Below, a pic of a Universal Geneve Tri-Compax

Note the four subdials. UG, the home of the 'Compax' designation, used it to refer to the number of complications, not the number of subdials. In the Tri-Compax for example, these were chronograph, calendar and moonphase. For UG, a three-subdial chronograph was simply a 'Compax.' Nowadays, everyone uses the term to mean three subdials, but I thought that the forum might find the history of interest.

To address your question, UG made Compaxes in a variety of sizes, most quite classic looking, all the way to 46mm.
(pic from antiquorum)

If you don't mind a certain loss of sobriety in relation to the Carreras, there are always the Primeros in the more classically styled cases - 38mm

: Difficult.. but on the 'want list'...

: Classic shaped case
: Clean layout
: Balanced design
: Preferably tri-compax

: Peter suggested the Breitling Top-Time, which is quite nice, is
: there another Breitling that is 'clean'. I do like the Navitimer
: / 806, but maybe something with less clutters dial.

: Never been a huge fan of the Daytona!

: Stewart