Ibanez BTB 5ers usually have 19mm string spacing at the bridge, the SRs are usually 17mm. MTD Kingstons are 19mm too. The Yamaha BB series 5ers are 18mm though and very comfy, as well as sounding huge!
As far as scale length is concerned, I’m a strong believer that string gauge has a much greater influence on string tension than an extra inch in scale length. In other words, don’t get too hung up on getting a bass with a 35” scale as there are plenty of fantastic basses out there at 34” or less!