The House is neither proportional (structurally represents parties roughly in proportion to their vote share) nor, what I expect you mean, divided into districts of equal population. The size difference between the smallest and largest districts—RI district 2 and Montana’s at large district—is 1:2 in population. It’s less unequal than the Senate, but its still not
equal representation.
And, despite certain bills having to originate in the House, the Senate is more powerful since all Congressional powers either require both houses in concert or the Senate alone (except for electing the President when there is an electoral tie, which the House does but with a voting rule of one-vote-per-state-delegation which gives it the same undemocratic weighting as the Senate has normally.)