https://community-scripts.github.io/ProxmoxVE/scripts?id=pihole

services:

  pihole:
    container_name: pihole
    image: pihole/pihole:latest
    hostname: sheldon
    environment:
      HOST_CONTAINERNAME: pihole
      TZ: ${TZ}
      WEBPASSWORD: ${WEBPASSWORD}
      DNSMASQ_LISTENING: "all"
      PIHOLE_DNS_1: "unbound#53"
    ports:
      - "53:53/tcp"
      - "53:53/udp"
      - "67:67/udp" # Only required if you are using Pi-hole as your DHCP server
      - "8080:80/tcp"
    # network_mode: host
    dns:
      - 127.0.0.1
    networks:
      dns:
        ipv4_address: 172.22.0.2
    volumes:
      - /mnt/appdata/pihole/etc-pihole:/etc/pihole
      - /mnt/appdata/pihole/etc-dnsmasq.d:/etc/dnsmasq.d
    restart: unless-stopped
    depends_on:
      unbound:
        condition: service_healthy

  unbound:
    container_name: unbound
    image: klutchell/unbound:latest
    networks:
      dns:
        ipv4_address: 172.22.0.3
    volumes:
      - /mnt/appdata/unbound:/opt/unbound/etc/unbound/custom
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "dig", "google.com", "@127.0.0.1"]
      interval: 10s
      timeout: 5s
      retries: 5

  wg-easy:
    container_name: wg-easy
    image: ghcr.io/wg-easy/wg-easy:15
    ports:
      - "51820:51820/udp"
      - "51821:51821/tcp"
    # environment:
    #   TZ: ${TZ}
    #   LANG: en
    #   WG_HOST: ${WG_HOST}
    #   PASSWORD_HASH: ${PASSWORD_HASH}
    #   WG_DEFAULT_DNS: 172.22.0.2
    #   WG_MTU: 1420
    networks:
      dns:
        ipv4_address: 172.22.0.4
    volumes:
      - /mnt/appdata/wg-easy:/etc/wireguard
      - /lib/modules:/lib/modules:ro
    cap_add:
      - NET_ADMIN
      - SYS_MODULE
    sysctls:
      - net.ipv4.ip_forward=1
      - net.ipv4.conf.all.src_valid_mark=1
      - net.ipv6.conf.all.disable_ipv6=0
      - net.ipv6.conf.all.forwarding=1
      - net.ipv6.conf.default.forwarding=1
    restart: unless-stopped

networks:
  dns:
    external: true

Feel free to just delete the wg-easy service.

https://github.com/IAmStoxe/wirehole

I used to use a pihole+unbound single container docker image but technitium is just easier for me. Might be worth exploring other options like adguard home also.