Bolleaux, yes, the electoral college plays a role in presidential elections only. So in a way, yes, Congressional elections (and governor's and state leg) races are more small-d democratic than presidential elections.
Still, Congressional races are affected by decades of gerrymandering plus the whole concept of the Senate (each state gets 2 Senators regardless of population, so Wyoming's 574,000 people get the same representation in the Senate as California's 39 million people).
Interestingly, there is no constitutional requirement that the House of Representatives is capped at 435 members. In fact it has been expanded several times in our nation's history. There are proposals to do so again, to make Representatives more, well, representative, but it is very unlikely to come to fruition as the current Reps would have to vote to dilute their own power....