Unattractive palm trunks
I have two very tall palm trees in my front yard. To me, they look like telephone poles. They are city trees in the easement so I can't remove them. 15-20 years ago I ripped out the lawn on the slope and planted one gallon size Phoenix roebellini (pygmy palm) and Cycad revoluta (Sago "palm") near them to make it look like a cluster of palms. I've been happy with that solution until the last time I pruned the smaller palms. They've grown quite well and now in addition to the original palm trunks I have a bunch of shorter unattractive palm trunks.
I would appreciate any ideas on how to make this more attractive. My initial thought is to add more plants, but I'm not sure where to locate them, or what size, form or leaf shape might look best. I'm also willing to remove plants. I've included two photos (sorry about the quality). One gives the overall layout, one shows more detail of a palm cluster. I should probably remove the Sago pups, but have left them temporarily in case they might be useful. There will be bulbs and small wildflowers blooming on the slope during the fall and winter.
Thank you in advance for any ideas.