I would go with façade front door.

I’m sure the landlord would jump at the chance to move the front door, and redo the porch. But in the slight chance he wouldn’t be interested in that option, I’d suggest that you suggest the hardiest and most maintenance free types of shrubs or bushes to plant along the front and save flowers and things that need more care for containers. Future renters might have no interest in complicated or extensive yard upkeep and your landlord probably isn’t keen on the idea of adding landscaping care to his list of things to do.

Pots up the steps, and if you can afford it, a small tree in a large pot at the front of the steps

Here are a few suggestions:

I suspect your landlord is not hugely interested in landscaping costs and upkeep otherwise the tree and existing sprawling bush would have been trimmed. I was a renter most of my life. I invested in big, cheap, light weight PVC neutral colored planters that I took with me from home to home. I have planted shrubs, trees, ferns, and annuals in them over the years and at different locations.

Place them strategically in the front of this house and invest your own money in them. I don't know what your lighting is like but huge. tall grasses in a would give you a lot of bang for your buck in planters and take up nice visual space to soften the base corner of the entry that projects into the front yard.

I've gotten good ones for cheap at Lowes, especially at the end of the season, and on Craigslist.

I would do some plantings along the walkway to lead guests to the front door the pots are a nice touch too. Not much tudor going on here so any plants that do well where you live . If the landlord is not into this just do pots all along the walkway and take them with you when you go.

@patricia how big of plants would you add?