With a Single Transferable Vote much like Ireland uses. This would involve multi-seat seat constituencies.

From wikipedia

This method of proportional representation uses a system of preferential voting to determine the results of the election

A constituency elects two or more representatives per electorate. Consequently the constituency is proportionally larger than a single member constituency. Parties tend to offer as many candidates as they most optimistically could expect to win: the major parties may nominate almost as many candidates as there are seats, while the minor parties and independents rather fewer. Voters mark their ballot, allocating preferences to their preferred ranking for some or all candidates. A successful candidate must achieve a quota, being the total number of votes received divided by the number of candidates to be elected plus one, plus one; i.e. in a nine member constituency the quota would be (the number of votes divided by 10) +1. Only in a few cases is this achieved at the first count. For the second count, if a candidate wins election her/his surplus vote (in excess of the quota) is transferred to her/his voters' second choices; otherwise, the least popular candidate is eliminated and her/his votes redistributed according to the second preference shown on them. If there are more than one candidate who can not get enough votes after the transfer of votes of least popular candidate, she or he will be eliminated too (as they could not avoid it on the next round under any circumstance).

This process continues for as many counts as are needed until all seats are filled either by the required number of candidates achieving a quota and being deemed to be elected or until there are only the number of candidates remaining as there are number of seats. Although the counting process is complicated, voting is clear and most voters get at least one of their preferences elected.

All deputies are answerable directly to their local constituents. Some political scientists argue that STV is more properly classified as 'semi-proportional' as there is no assurance of a proportional result at a nationwide level. Indeed, many advocates of STV would argue that preventing nationwide proportionality is one of the primary goals of the system, to avoid the perceived risks of a very highly fragmented legislature.

It's a far from perfect system and many here (including myself) would rather we move to a list system, but it is certainly an improvement over first past the post single seat constituencies.