No, that's pretty much it as regards players currently looking like winning major / any titles.
There's my favourite player, Jack Lisowski, who is 33 and was a top 16 player for a good few years before recently dropping out. He's got bags of talent, and has reached 6 ranking finals - but he's a bottler and has lost them all! His temperament, and lack of tactical play, has prevented him from kicking on - but there's the potential of a top 16 and rankings winner in him: he's already proven the former, and just kept coming short on the latter though it's been a while now since he last threatened a win.
There's Joe O' Connor and Elliot Slessor who are 28 and 30 respectively and are just about either side of the top 32 at present. But that's about as high as they've got so far and neither have suggested much more - and certainly not getting anywhere close to the Trump / Wilson level.
Younger wise, the best two are probably Jackson Page (23) and Stan Moody (18). Page has been around for a while now on the tour - he's got good ability but, like Lisowski, lacks an all round game and is currently more about retaining his place on the tour than threatening the top 32/16. Though he did reach a smaller final earlier in the season.
Moody is a promising player who I've been aware of for a few years now. He's in his second season and, after a disappointing first season, he's doing better this year. Though he's going to face a battle to retain his place on tour and might have to rely on the one year list. But hopefully he can continue to progress as he looks to have high potential and certainly seems the best hope out there of any of the youngsters.
But pretty slim pickings, UK wise, once you look past Trump and Wilson at the moment.