How many climbers

Hi everyone, while I'm waiting for some concrete plinths to cure before drilling, I have some questions on climbing plants.
Basically I will have 8ft of trellis to grow some climbers, I have rose "teasing georgia" for the centre, will there be enough room to plant another climber either side? If so I've found a star jasmine that I'd totally forgotten about I must of had it 5 or 6 years and the poor thing has been totally neglected would that be ok to plant one side? And also if so could someone recommend a climber for the other side preferably white and bird, bee and butterfly friendly. It's pretty much south facing. Thanks.