If you're desperate for upright plants then: Pea and bean netting laid down in two layers, the first one March attached to canes about 15 cm high and the second one in April/May about 30cm (where needed) for the plants to grow through: it's soon hidden.
For my mind, why not just let them flop? I appreciate that rules out those with unnaturally large flowers and brittle stems, but if you're growing something like that, hiding staking doesn't help as it will look unnatural anyway.