As a replacement for ollama, LM Studio is probably the most appropriate. Though I haven't tried Unsloth Studio yet. You get more control using llama.cpp directly, but there's more of a learning curve.

vLLM has the best performance if you can fit your entire model into VRAM. llama.cpp is the usual go-to if you're partially loading into RAM. LM Studio is a sensible front-end to llama.cpp. ik_llama.cpp has more advanced CPU quantization strategies than llama.cpp. If you're running super large models mostly from RAM, ktransformers can sometimes be the highest performer, if it works for your model.